The 106-Hour Problem.

How 66 unaccounted hours a week are quietly draining your margin

Here’s an uncomfortable bit of maths. Your doors are open around 106 hours a week. A full-time contract covers 40. That gap is not a rounding error. It is where your profit is either quietly engineered or quietly lost.

Quick question: who decided 40 hours was “full-time”?

It wasn’t a restaurant owner. It wasn’t a publican eyeballing a Saturday night. It was a government policy from 1938, designed for factories. Same shift, same o

utput, same nine-to-five, Monday to Friday. Brilliant for making widgets. Less brilliant for a Friday at 7:30pm when forty people walk in at once and your fridge of prosecco starts sweating.

Hospitality has never fitted that mould. But most rotas are still built as though it does. This piece explains why that costs you money and what to do about it.

Do the maths on your own front door

The 106-hour figure is not plucked from thin air. It is a straightforward calculation for a venue trading across a full week.

Say you open Monday to Saturday, 7:30am to 11pm. That is 15.5 hours a day, six days a week. Ninety-three hours. Add Sunday, 9am to 10pm, and you are at 106 hours a week. One full-time contract covers 40 of those. So before anyone has taken a break, booked a holiday, called in sick or done the prep, you already need 2.65 full-time people just to unlock the door and keep it open.

Think of it like a relay race where the baton can never touch the ground from breakfast until last orders. One runner cannot do that. You need a team, handing off cleanly, all day.

Your venue’s number will be different. Run it yourself:

1. Write down your opening and closing time for each day you trade.

2. Calculate the hours for each day and add them together.

3. That total is your trading week in hours.

4. Divide by 40 and you have the minimum number of full-time equivalents it takes just to cover the building, before a single customer has walked in.

   
   

A café trading 7am to 5pm, six days a week, has a 60-hour trading week and needs 1.5 full-time equivalents just to keep the door open. A pub trading 11am to midnight, seven days, sits at 91 hours and needs 2.3. A late bar running Wednesday to Sunday, 5pm to 2am, has a 45-hour week and needs 1.1. Whatever your number, it is almost certainly higher than you think.

And the gap between that number and your contracted hours is where the labour puzzle begins.

The real cost of a shift is not what you think

Most operators cost a rota by multiplying the hourly rate by the number of hours. That figure is wrong before the rota is even written.

The wage on the contract is not the total cost of employing someone. On top of it sit three additional employer obligations that many rotas never fully account for.

Put those three together and the true cost of employment is typically 13 to 18% above the headline hourly rate. On the current National Living Wage of £12.71 an hour, a 30-hour-a-week team member costs the business closer to £14.40 an hour by the time National Insurance and pension are included. On a full team of ten people averaging 25 hours a week at that rate, the gap between the wage bill and the true employment cost is roughly £1,200 to £1,500 a month. That is money leaving the business every month that many operators have never clearly seen on a single page.

The point here is not that employing people is bad. The point is that if you are building a rota using the wage rate as your cost basis, your labour budget is already wrong before you have scheduled a single shift.

Your trading profile is not the same as your staffing profile

Here is where most rotas break down. Not in the hours, but in the timing.

A 106-hour trading week is not 106 equal hours. It has peaks and troughs, rushes and dead stretches. A busy Saturday evening is not the same as a quiet Tuesday lunchtime. The problem with building a rota around standard shift patterns is that you end up staffing the quiet periods as heavily as the busy ones, and under-staffing the moments that actually earn you money.

The fix is a demand profile. It does not require any software or specialist knowledge. It requires honesty about when your customers actually show up.

Split your trading week into blocks. These might be two-hour slots, or broader periods such as morning, lunch, afternoon and evening. For each block, assign a demand level based on what you genuinely know about your business. A simple five-point scale works well:

Your Friday and Saturday evenings are almost certainly Peak. Your Monday and Tuesday lunchtimes are probably Dead or Quiet. Bank holidays may flip the whole thing. Local events, school half-terms, pay day weekends, sporting fixtures: all of these shift the profile, and the rota should shift with them.

Once you have mapped your demand profile for a typical week, lay your current rota over the top of it. Be honest about what you see. Are your heaviest-staffed shifts your busiest? Are you carrying full cover through periods when two people would do the job of four? Are you stretched thin on the nights that generate the bulk of your revenue?

Most operators who do this exercise find at least one or two mismatches they had stopped noticing because the habit of scheduling that way had become invisible.

A heavy Tuesday that nobody ever questioned. A Friday gap that everyone felt but nobody formally fixed. The demand profile makes the invisible visible.

What should your labour percentage actually be?

Labour percentage is the most useful single number for managing your staff cost. The calculation is simple: your total labour cost divided by your total revenue, expressed as a percentage.

Industry benchmarks vary by venue type, and it is worth being clear that these are benchmarks, not targets. Food-led restaurants typically aim to keep labour at 30 to 35% of turnover. Pubs and bars generally sit at 25 to 30%. Cafés and coffee shops often run higher, at 35 to 40%, because the lower average spend per customer means labour is proportionally more expensive relative to what each transaction earns.

Your number will depend on your model, your price point, and your service style. A kitchen with a complex menu and skilled chefs commands a different wage structure to a bar with a simple food offer. A venue with highly trained front-of-house staff whose upselling and service drives the spend per head will naturally run differently to one that is largely self-service. The benchmark is a navigation point, not a rule.

The benchmark is useful for one specific reason: it helps you diagnose whether you have a labour cost problem or a revenue problem. If your labour percentage is high because your wage bill is too large for the trading pattern you have, that is one conversation. If it is high because your revenue is too low, cutting your team is the wrong answer. It makes the service worse and compounds the revenue problem. These are different problems that require different solutions, and conflating them is one of the most common and costly mistakes in hospitality management. We will cover that specifically next week.

The critical thing when calculating your own labour percentage is to include the true employment cost, not just the gross wage bill. Take your total monthly wages, add 15% to approximate National Insurance and pension contributions, and divide the result by your monthly revenue. That is your real labour percentage. If it is inside the benchmark for your venue type, you are broadly on track. If it is above it, you now have a clear number to work against rather than a vague sense that wages feel too high. 

Three questions to put to your rota this week

You do not need a full audit to start finding where the money is leaking. Start here.

First, calculate your true labour percentage for last month. Take your total wage cost, add 15% for on-costs, and divide by last month’s revenue. Is the number inside the benchmark for your venue type? If you do not know, that itself is important information.

Second, compare your three busiest shifts last month against your three quietest. How many people were on for each? Were the busiest shifts your best-staffed? Were the quietest shifts carrying more cover than they needed? If the staffing levels were broadly similar across all six, your rota is following a pattern rather than following demand.

Third, add up the total wage cost of your three slowest trading shifts last month. That number is not a fixed overhead. It is a scheduling decision that repeated itself every week of the year. Annualise it and see what it looks like. A dead Tuesday lunch that costs £180 in wages and takes £60 in revenue is not a staffing problem in isolation. It is a £6,240-a-year decision that deserves a proper look.

None of this requires new tools or a restructured business. It requires looking at numbers you already have through a clearer framework.

The takeaway

There is no such thing as a 40-hour week in hospitality. There are only 106 trading hours, a real employment cost that is typically 13 to 18% above the headline rate, and a demand profile that shifts every day of the week.

Open RotaIQ and run the three questions above against last month’s rota. The demand profile exercise takes less time than you think, and the labour percentage calculation will either reassure you or give you something concrete to act on. Either way, you will know more at the end of it than you did at the start.

Next week, we look at one of the most common responses to a labour cost problem, and why, without the right information first, it so often makes things worse rather than better.

RotaIQ is a free labour scheduling and planning tool built for hospitality operators. rotaiq.co.uk