Free guide

Dressing for work, without a dress code

Three variables decide work clothing. The formality register tells you which garments are in play. Fit decides whether they work at all, and it outranks everything you spent money on. Fabric decides whether they survive close scrutiny — a camera, a bright room, a person sitting across a table. Almost every specific rule people repeat, from avoiding fine stripes to wearing a jacket to an interview, is a special case of one of those three.

By Max Werner, who builds PoseLab27 min read

In short

  • Three variables decide work clothing: formality register, fit, and how the fabric behaves under scrutiny. Nearly every specific rule is a special case of one of them.
  • The registers have drifted down about a step since 2019. Business casual now means what smart casual used to, and your handbook has not been revised.
  • When you don't know the room, dress one level up and no further. Overdressed is fixable in the corridor; underdressed is not fixable at all.
  • Fit outranks price. Buy to the shoulder and the seat, which cannot be altered, and have the sleeves, hem and waist brought to you.
  • Fine regular patterns shimmer; bold irregular ones compete. They are unrelated problems, which is why one blanket rule cannot cover both.
  • Contrast between garment, skin and surroundings is the part of colour advice that holds up. Seasonal palettes are merchandising.

01

The five registers, decoded

What business formal, business professional, business casual, smart casual and casual mean in actual garments.

A register is a band, not a uniform

A register is a band of formality, not a specific outfit — a range of garments a room reads as roughly equivalent, which is why two people at the same meeting can be dressed differently and both be correct. What matters is where the edges are: the least formal garment that still counts as business professional, the most formal that still counts as casual.

The table below is written by garment category rather than as two gendered lists, because the category is what a room reads. A structured shoulder over a clean top with a proper shoe reads as business professional whether the bottom half is trousers or a skirt. Splitting the advice in two doubles the length and halves its usefulness.

Read a row across and you have a complete outfit at that register. Mix rows and you land between the two, which is usually fine and occasionally the point: a suit jacket over a knit sits deliberately between business professional and business casual.

The five registers by garment category. Read a row across for a complete outfit at that level.
RegisterJacketTopBottomShoe
Business formalDinner jacket or morning dress. No substitutions; the garment is the registerFormal shirt with a turndown or wing collar, bow tieMatching formal trousers, or a long skirt or gownPatent or high-shine black lace-up
Business professionalMatched suit jacket, navy or charcoal, sleeves showing a little cuffCollared shirt or a fine shell. Tie optional, and increasingly absentSuit trousers or a knee-length skirt cut from the same clothPolished leather lace-up, loafer or low court shoe
Business casualUnmatched blazer, or none — the jacket stops being compulsory hereCollared shirt, fine-gauge knit, or a smart blouseChinos or wool trousers. Dark unfaded denim in many offices nowLeather loafer, derby, clean ankle boot, plain leather trainer
Smart casualOvershirt, unstructured jacket, cardigan, or nothing at allKnit, polo, casual button-down, plain tee under a layerChinos, dark denim, a structured casual skirtClean leather trainer, boot or loafer. No visible branding
CasualWhatever is warm and not falling apartTee, sweatshirt, flannel shirt, hoodie in some officesJeans, casual trousers, shorts where the office allows themTrainers, in a state you would not mind being seen in

Every label has slipped down a step

Since 2019 the whole scale has drifted about one full step downward, and fastest in the middle. What most offices now call business casual is what those same offices would have called smart casual before, and what they call smart casual is close to what used to be plain casual.

The written dress code is usually older than the practice. A handbook that says business casual was probably written when the phrase meant a collared shirt and pressed wool trousers, and has not been revised since. Dress to the document and you will be a step more formal than the room — a survivable error, and a smaller one than the reverse, but worth knowing you are making it.

Two registers held their ground. Business formal has not moved at all, because it is defined by specific garments rather than by a feeling, and a dinner jacket cannot drift. Business professional held where a jacket still signals something; the tie quietly went, so what was a suit and tie is now a suit, unchanged.

  • The tie is now a deliberate signal rather than a default, even in industries that kept the suit.
  • Denim crossed from smart casual into business casual in most offices, provided it is dark, unfaded and untorn.
  • A leather trainer without visible branding now passes at business casual where any trainer would once have failed.
  • The written code in your handbook is a record of where the office used to be, not where it is.

Three registers, side by side

The gaps between registers are easier to see than to read about. These three are our own sample photographs, made with PoseLab, and each sits cleanly in a different band — the distances the table above describes, in garments rather than in words.

AI headshot in corporate style — woman in navy suit, grey office background
Corporate

Business professional. The matched jacket and a closed collar are doing the work; take the jacket off and this drops two registers immediately.

AI headshot in startup style — man in crew-neck sweater, exposed-brick wall
Startup

Business casual as most offices now use the term. No jacket, no collar, and it still reads as dressed rather than as off duty.

AI headshot in friendly style — woman in light grey blazer, bright studio lighting
Friendly

The useful hybrid: a jacket over a plain top. It borrows the shoulder line from the register above while staying comfortably in the one below.

Created with PoseLab from selfies. Not stock photography.

02

Reading a room you haven't been in yet

The one-level-up heuristic, and what it means for interviews, first days, conferences, client sites and video calls.

One level up, and only one

The single most useful heuristic here: when you do not know the register, dress one level above what you expect and no further. One level up reads as having taken the occasion seriously. Two levels up reads as having misunderstood it, and in some rooms as not knowing the people you are meeting.

It works because the cost is asymmetric. Overdressed is correctable in seconds: take the jacket off, undo the top button, push the sleeves back. Underdressed is not correctable at all, because you cannot produce a garment you did not bring. Make the mistake you can fix in the corridor.

Which is why the removable layer is the most valuable thing in a work wardrobe. A jacket you can take off is a register you can leave; a knit you can push up the forearm is a smaller version of the same trick. Buy for uncertain rooms accordingly.

The situations that actually come up

You are rarely choosing a register in the abstract; you are dressing for one of a handful of recurring situations, each of which shifts the calculation. Below is the one-level-up heuristic applied to each, with the reason attached so you can adapt.

  • Interview: one level above the daily register of the team you are joining, not of the company as a whole. An engineering interview at a bank is not a banking interview.
  • First day: match what you saw at the interview, then watch for a week and settle where the team actually sits. Nobody is judged for being formal on day one.
  • Conference: dress for standing up, walking a long way and being photographed badly. Comfortable shoes and a layer you can remove beat an outfit that only works seated.
  • Client site: the client's register, not yours. Dressing above the person paying is worse than dressing below them.
  • Speaking or presenting: one level above the audience, always — the one occasion where being the most formal person in the room is right.
  • Video call: only the top half is visible, so it carries the whole register on its own — but dress the bottom half anyway, because standing up is a normal thing to do.
  • Site visit with safety equipment: the equipment sets the register and everything else is subordinate to it. Nothing loose, nothing that has to be held on.

When the old rules don't apply

Changing industry is where the heuristic needs help, because you no longer have a reliable sense of what one level up even is. The usual failure is carrying your old register across intact: the lawyer moving into technology who wears the suit and is the only person in the building wearing one.

The fix is to observe rather than guess. Find the people roughly one level above you in the new field — not the founders, who are often exempt from the code, and not the most junior, who are still working it out — and look at how they present themselves publicly. Conference photographs, team pages and recorded talks are easier to read than a job description.

Then dress to the middle of what you see, not the top of it. The people at the top of any observed range are usually doing something specific: a photograph from a funding announcement, or a day on stage. Copying the outlier is how you end up two levels up rather than one.

03

Fit is most of it

The four fit points that decide whether any other decision matters, and the alterations that outperform expensive clothes.

Why fit outranks everything above it

The previous two chapters decide which garments to wear. This one is about whether they fit, and fit beats all of it. A cheap jacket that fits looks considered. An expensive jacket that does not looks like a jacket belonging to somebody else, and no amount of cloth quality, cut or provenance rescues it. People who cannot name a single thing that is wrong will still see that something is.

Clothing communicates through its lines. A shoulder seam in the right place produces a clean horizontal that reads as structure; the same seam an inch out produces a soft break that reads as slump. Nobody consciously registers the seam. Everybody registers the slump. That is why fit is worth more of your budget than anything else in this guide.

Four points decide almost all of it. Learn them properly: once you can see them you can assess a garment in about ten seconds, in a shop, before you have thought about colour or cloth or price — and three of the four can be corrected for a small fraction of what the garment cost.

The four points, and how to check each

Check these standing square to a mirror, arms hanging naturally at your sides. Not posed, not holding your breath — the posture you actually stand in, because that is the posture the garment has to work in. Most fit mistakes are made by someone unconsciously standing better than they normally do.

The four fit points, in the order they matter.
Fit pointHow to check it on yourself
Shoulder seamThe seam should sit where the flat top of your shoulder turns down into your arm. If it hangs past that point and the sleeve dents inward underneath, the garment is too big. If it sits inboard and pulls diagonal creases out of the armhole, it is too small. This is the one point a tailor cannot fix affordably, so it is the point that decides which garment you buy.
Sleeve lengthA shirt sleeve should end at the bone on the outside of your wrist, so it stays put when you reach forward. A jacket sleeve should end above that, leaving a narrow strip of shirt cuff visible. If you cannot see the cuff at all, the jacket sleeve is long — which is the most common alteration left undone, and the cheapest one to have made.
Trouser breakThe break is what the hem does when it reaches the shoe. Aim for the hem just touching the top of the shoe with a single soft fold, or no fold at all. Stacked folds at the ankle read as unfinished no matter what the trousers cost. Have the hem set with the shoes you will actually wear, because heel height changes the answer.
WaistTrousers should stay up without a belt taking the strain — the belt is there to finish the look, not to hold the garment on. On a jacket, do it up and look for a horizontal wrinkle radiating from the button. That wrinkle means the jacket is pulling and needs to be let out; a straight, calm front means it is right.

The alterations worth paying for

Three of the four points above are cheap to correct, and a tailor who does nothing else will improve a wardrobe more than a shopping trip will. Sleeve shortening, hemming and taking in a waist are routine work at any alterations shop, and cost a fraction of the garments they fix. So shop differently: buy to the point that cannot be altered, and have the rest brought to you.

For a jacket that means buying to the shoulder and having everything else adjusted. For trousers it means buying to the seat and thigh, which are structural, and having the waist and hem set afterwards. For a shirt it means buying to the neck and shoulder, then having the body taken in if it billows — a shirt that balloons under a jacket is common and entirely fixable.

What is not worth it: recutting a shoulder, moving a lapel, changing a jacket's overall length, or altering anything knitted. These are either impossible or cost more than the garment is worth. If a garment is wrong at the shoulder, it is wrong, and continuing to own it is a decision to keep being disappointed by it.

  • Worth doing: shorten sleeves, hem trousers, take in a jacket or shirt waist, move a button, taper a trouser leg.
  • Not worth doing: recut a shoulder, change jacket length, reshape a lapel, alter a knit, let out a garment with no seam allowance.
  • Take the shoes and the shirt you will wear with the garment to the fitting. The measurements depend on both.
  • Have new trousers hemmed before the first wear rather than after. Nothing about them will improve by waiting.

Fitting a body that isn't a standard size

Sizing charts describe an average that very few people are. Broad shoulders with a narrow waist, a long torso, a short rise, one shoulder lower than the other — all ordinary, and none accommodated by off-the-peg sizing, which varies a single number and scales everything with it. If nothing ever fits, the likeliest explanation is not your body but the assumption built into the size run.

Buy to the widest or most structural measurement and have the rest brought in. That produces a garment too big in several places and correctable in all of them — a better starting position than one that is right in one place and impossible everywhere else. The label size is not information about you; it is information about that manufacturer.

The one asymmetry worth naming: a garment can nearly always be made smaller and rarely made larger, because letting out depends on seam allowance the maker may not have left. When you are between sizes and genuinely cannot decide, the larger one is the one with options.

04

Fabric and pattern under scrutiny

Two unrelated ways a pattern fails, plus weight, drape, how synthetics read under light, and why texture beats pattern.

Two failure modes, pointing in opposite directions

"Avoid patterns" is one real phenomenon over-generalised. There are two ways a pattern fails under close scrutiny, they are unrelated to each other, and they point in opposite directions — which is why a single blanket rule cannot cover both.

The first is scale. A fine, regular repeat — a pinstripe, a hairline check, a tight birdseye — interferes with whatever grid is sampling it: a camera sensor, a screen, or the eye's limit across a room. What comes back is a crawling, iridescent flicker that reads as damage rather than as cloth. It depends on the ratio between the repeat and the size it is seen at: the same jacket is immaculate in person and broken in a small photograph.

The second is attention, and has nothing to do with resolution. A bold, irregular pattern does not shimmer — an irregular repeat has nothing regular to interfere with — but it becomes the second thing worth looking at in a situation that should have one. Hence the conclusion that surprises people: a tonal paisley is often safer than a high-contrast pinstripe. Scale and contrast decide, not the pattern's name.

The full treatment, band by band from solids up to architectural checks, is in our article on patterns in professional photographs. It carries a slider that shrinks a strip of swatches until the fine repeats break up and the irregular ones don't — the scale argument made better than any paragraph can.

  • Fine and regular is the risky combination. Fine and irregular is not, and bold and regular is not either.
  • Contrast within the pattern matters more than its name: a tonal check survives what a white-on-navy one does not.
  • Two patterns work together if their scales are clearly different. Two patterns at similar scale always fight.
A professional man in a navy jacket with very fine bright pinstripes against a grey studio background.
Fine, regular, high-contrast: the one combination that shimmers.AI-generated illustration for PoseLab. Not stock photography.
A professional woman in a navy jacket with a very fine tonal birdseye weave against a grey studio background.
Finer still, but tonal — the same scale, and it holds.AI-generated illustration for PoseLab. Not stock photography.
A professional woman in a dark teal blouse with a large tonal paisley pattern against a grey studio background.
Bold and irregular, kept tonal: nothing to shimmer, nothing to answer.AI-generated illustration for PoseLab. Not stock photography.
A professional man in a cream shirt with a large burgundy and navy paisley print against a grey studio background.
The same shape at full contrast: stable, and now the second thing you look at.AI-generated illustration for PoseLab. Not stock photography.

Weight and drape decide how a garment hangs

Weight is the property nobody shops for and everybody notices. A heavier cloth hangs straighter, holds a crease, and returns to shape after a day of sitting down; a light one clings, creases where it folded, and shows every contour underneath. That is most of the difference between two visually identical trousers at six in the evening.

Drape is the separate question of how cloth falls when nothing is holding it. Good drape moves as a mass and hangs in long, soft lines; poor drape either stands away stiffly, holding a shape that is not yours, or collapses into small creases the moment you move. Test it in seconds: gather a handful of the fabric and release it. Good drape falls out and settles; poor drape keeps the shape of your fist.

So mid-weight beats light almost every time. Light cloth is a summer decision, not a default, and a cheap suit reads as cheap more because of weight than cut. If two garments look identical, pick both up: the heavier one will still look right in the afternoon.

Synthetics, shine, and why texture beats pattern

Synthetic fibres are not the problem; blends solve real ones — they hold a crease, resist wear, cost less. Shine is the problem. Smooth synthetic surfaces reflect light in one direction rather than scattering it, so under a bright ceiling light they throw hard patches that a broken natural surface does not, and the garment stops reading as cloth.

The test: hold the garment under the strongest light available and turn it. If a bright highlight slides across the surface, it will do that in every bright room you take it into. Matte scatters light instead, and matte is the property to shop for — it matters more than the fibre content on the label.

The most underused option in work clothing is texture. A cable knit, a waffle, a twill line, an oxford basketweave, a linen slub, a corduroy wale, a flannel nap — each has a repeat too small to read as a pattern, so none of them carry the shimmer risk or the attention cost. What they give instead is depth: a textured mid-grey knit is more interesting than a flat one at exactly the same risk, which is none.

05

Colour, contrast, and "your colours"

The defensible part is contrast between garment, skin and surroundings. The seasonal-palette industry is marketing.

Contrast is the arithmetic that matters

"Which colours suit you" is nearly unanswerable, and is where most of the confident nonsense in this field lives. "How much does this garment separate from what is next to it" is answerable, and it decides whether an outfit works at a distance, in a photograph, or across a table.

Three things are in play and two gaps between them: your skin and hair, the garment, and what is behind you. Each gap needs enough difference that the eye reads them as separate. Dark clothing against a dark wall loses the outline of your shoulders, leaving a head with no body; pale clothing under strong light against a pale wall fails from the other end. Neither is a colour being wrong; both are a gap being too small.

Mid-tones are the safe default because they sit between skin and most surroundings, so both gaps stay open without effort — slate, forest, warm grey, burgundy, olive. Not that they suit everyone — that they fail less often, being unlikely to collide with your skin or the wall behind you. The two conditions under which black and white are exactly right are in our piece on choosing colour for a headshot.

What survives distance, and what survives a table

Colour is among the first things to go as viewing distance increases. Across a room, or in a photograph seen small, what survives is brightness and shape — your top being darker than the wall, the vertical line down each side from a jacket, the collar framing your face. Hue stops carrying information long before shape does.

Up close it inverts. At a meeting table, hue and finish become visible again and the failure modes change: a black that has faded towards brown next to a true black, two navies that are obviously two different navies — invisible from across a room.

So know which distance you are dressing for. A conference stage and a client meeting have different answers. If you have to satisfy both, dress for the far case, because the near case forgives more.

"Your colours" is marketing, mostly

The seasonal palette industry — you are a Winter or an Autumn, so a fixed set of shades is right for you and the rest wrong — is presented as a method and works as merchandising. Different practitioners assign the same person to different seasons, and the classification does not survive changing your hair colour, which ought to end it as a theory about a person.

The real observation underneath is worth keeping. Some colours sit closer to your own skin and hair in brightness, and those give the eye less to separate. A garment very close in tone to your skin makes face and top read as one continuous area — which is what washed out means: a gap problem, not a season.

So keep the mechanism and drop the taxonomy. Hold a garment next to your face in daylight and ask one question: is there a clear difference in brightness? If yes, it will work in almost any room. If no, it needs help from a background or a layer — a decision you now make deliberately rather than inherit from a chart.

06

A small wardrobe that covers everything

The fewest garments that reach every register in chapter one, with the reasoning attached.

The principle: overlap by one register

A working wardrobe does not need a set of clothes per register. It needs a few garments that each straddle two adjacent registers, so any pair of them lands somewhere useful. That is what makes a capsule small: the jacket that finishes a business casual outfit is the one that softens a business professional one, and the knit that dresses down a suit dresses up chinos.

Those garments are plain, mid-toned, matte and structurally simple, because anything with a strong identity of its own can only be worn where that identity is wanted. A patterned jacket is one outfit; a plain one is six. Not everything you own has to be boring — only the pieces doing structural work. Character comes from texture and from what you add later.

One warning: it is easy to buy a whole capsule at once and end up with clothes that fit a theory rather than your actual week. Look at what you did last month and build for that. If you have not worn a suit in two years, the jacket below can be an unstructured one and the list gets simpler.

The list, and what each piece is doing

Everything below is specified by category, colour and finish rather than by brand, because the brand is the least informative thing about a garment. Fit and cloth weight are what matter, and those you check in person against the four points in chapter three.

A capsule that reaches every register, by what each garment is doing rather than by brand.
GarmentWhat to look forRegisters it reaches
Dark suitNavy or charcoal, mid-weight, plain or with texture only. Bought to the shoulderBusiness formal at the edge, business professional as standard
Unmatched blazerMid-grey or a textured navy, soft or unstructured shoulderBusiness professional down to smart casual
Two collared shirtsWhite and pale blue, matte cotton, collar with enough body to stand upBusiness professional down to business casual
Fine-gauge knitMid-tone, crew or V-neck, thin enough to wear under a jacketBusiness professional down to smart casual
Textured knit or overshirtCable, waffle or a heavy weave. Depth without patternBusiness casual down to casual
Wool trousersCharcoal or grey, mid-weight, hemmed to the shoes you ownBusiness professional down to business casual
ChinosStone, navy or olive, cotton with no shine, cut clean through the legBusiness casual down to casual
Dark denimDeep indigo, no fading, no distressing, no visible hardwareBusiness casual in many offices, smart casual everywhere
Leather lace-upsBlack or dark brown, plain toe, resoleable, kept polishedBusiness formal at a push, business professional properly
Leather loafers or clean bootsDark, unadorned, no visible branding or contrast stitchingBusiness professional down to smart casual

What to add first, and what never to add

Once the list above is covered, add against gaps you actually hit rather than a sense that the wardrobe is small. The usual first additions are a second pair of trousers in a different weight, so summer and winter both work, and a coat that goes over the jacket without crushing the shoulder — an overcoat ending below the jacket hem.

Accessories are where a small wardrobe gains character or loses coherence, and the deciding property is scale. Small and matte disappears into an outfit; large and shiny becomes the thing people look at. A watch, a plain belt matched roughly to the shoes, and one piece of jewellery you actually like is a complete answer; the failure is quantity.

What never earns a place: anything with legible text, a visible logo or a novelty print, because people read text involuntarily. Anything shiny enough to catch a ceiling light. Anything that only works with one other garment you own, which is an outfit pretending to be a piece. And anything you keep because of what it cost — a sunk cost wearing a hanger.

07

When you'll be photographed

What changes when the clothes have to survive a camera as well as a room.

A photograph is a harsher room

Everything in this guide holds in front of a camera, only less forgivingly. A photograph freezes one moment, flattens depth, often crops at the shoulders and is usually seen small. Each of those narrows the margin: the fine stripe that shimmers slightly across a room shimmers unmistakably in a picture, and the pale top that was merely bright becomes the brightest thing in the frame.

The three variables carry over intact. Register still has to match the industry, and a suit in a field that stopped wearing them reads as a costume — the dress code by industry covers where the lines currently sit, including the regulated and uniformed professions most guides skip. Fit is more visible than in life, because a still image gives people time to look, and fabric is where chapter four's scale and attention problems do their damage.

Two things change enough to name. The crop means you are choosing about six inches of clothing, so the neckline and collar carry a weight they never carry in a room. And display size decides the pattern question outright, which is why what to wear for a LinkedIn photo reaches different conclusions from general headshot advice, and both are right.

If the photograph is AI-generated

PoseLab makes headshots from selfies you already have, and the wardrobe comes with the style you pick — so the choice moves from what you wear on the day to which register the finished photograph should sit in, which is the decision chapter one describes. How we choose the styles is an account of those wardrobe decisions rather than a pitch, including the ones we got wrong first. You can try it without paying: upload a few selfies and get one finished headshot back, no card.

What carries over into the selfies you upload is short. One flat colour, nothing across your face, nothing printed on the garment — chapter four's scale problem applies to what goes in as much as what comes out, so a fine check in a selfie works against you before anything else starts. The rest of this guide is about the room rather than the camera, and stands on its own whether or not you ever buy a photograph from anyone.

Keep reading

Dressing for work — FAQ

What does business casual actually mean now?+

A collared shirt, a fine knit or a smart blouse, with chinos or wool trousers and a leather shoe. The jacket is optional, and in most offices dark unfaded denim now passes. It is roughly one step less formal than the same phrase meant a few years ago, so a handbook using it is probably describing something dressier than the room.

How should I dress for an interview if I don't know the dress code?+

One level above the daily register of the team you are joining, and no further. Two levels up reads as having misunderstood the place. Choose something with a layer you can remove, so if you have judged it wrong you can drop a register in the corridor before you sit down.

Is it worth paying for alterations on cheap clothes?+

Usually yes, and the economics are lopsided. Shortening sleeves, hemming trousers and taking in a waist cost a small fraction of a garment's price and change how it reads completely. What is not worth it is recutting a shoulder or altering a knit, which costs more than the garment is worth.

Can I wear patterns to work?+

Yes, but judge them on scale and contrast rather than on the name. Fine regular repeats like pinstripes and tight checks break up when seen small or from a distance. Bold irregular patterns do not do that at all, but they draw attention. A tonal pattern of any kind is safer than a high-contrast one.

Do I need to know my colour season?+

No. Different practitioners will put the same person in different seasons, and the answer changes if you dye your hair, which tells you it is not describing you. The useful part underneath is contrast: hold the garment next to your face in daylight and check there is a clear difference in brightness.

What should I wear on a video call?+

Only the top half is visible, so it carries the whole register alone — a collar or a jacket does more work here than anywhere else. Avoid fine patterns, which fall apart at small sizes, and anything shiny, which catches the light. Then dress the bottom half anyway, because standing up happens.

See yourself before you pay.

Upload 3–20 selfies. Get one watermarked headshot back in about 60 seconds. Pay only if you love it — and we'll refund within 14 days if you change your mind.

Free preview · No subscription · 14-day money-back guarantee