The Costs That Run Whether You Sell Anything or Not
Every business has two kinds of cost. There is the cost of the thing you actually sell, and there is the cost of simply being open for business. Overheads are the second kind. They are the rent, the software subscriptions, the insurance, and the office heating that carry on whether you land a single sale this month or a hundred.
Most owners can tell you what their best-selling product costs to make. Far fewer can tell you what it costs to keep the lights on before they sell anything at all. That second figure is your overhead, and it quietly sets the floor under your whole business. Price below it and you lose money on every sale no matter how busy you are.
This guide explains what overheads are in plain English, shows how they differ from direct costs, walks through a worked example, and covers the one calculation that turns overheads from a vague worry into a number you can manage.
What Overheads Actually Are
Overheads are the ongoing costs of running a business that are not tied directly to producing a specific product or delivering a specific job. They are sometimes called indirect costs, operating expenses, or simply running costs, and they appear on your profit and loss account below the gross profit line.
The defining feature of an overhead is that you cannot trace it to one unit of output. If you run a bakery, the flour and the baker's hourly pay go into each loaf, so they are direct costs. The rent on the shop, the accountant's fee, and the public liability insurance do not change loaf by loaf. You pay them to have a bakery at all. Those are overheads.
Common business overheads include:
- Rent, business rates, and service charges on premises
- Utilities such as electricity, gas, water, and broadband
- Insurance, from public liability to professional indemnity
- Software, subscriptions, and IT support
- Administrative and management salaries not tied to production
- Accountancy, legal, and other professional fees
- Marketing, advertising, and website costs
- Office supplies, cleaning, and general maintenance
None of these make a single sale on their own. Together they are the cost of being a functioning business, and they have to be covered out of the gross profit your sales generate.
Overheads Versus Direct Costs
The cleanest way to understand overheads is to put them next to their opposite. Direct costs, also called cost of sales, are the costs you would not incur if you did not make the sale. Overheads are the costs you would still incur if you stopped making sales for a month.
A worked split makes this concrete. A small joinery business takes on a kitchen fitting job. The timber, the worktops, and the wages of the fitter on site are direct costs, because they exist only because the job exists. The workshop rent, the van insurance, the bookkeeping software, and the owner's time spent quoting are overheads, because the business pays them across every job and across the quiet weeks between jobs.
Why does the line matter? Because direct costs are subtracted from revenue to give your gross profit, and overheads are then subtracted from gross profit to give your net profit. Misclassify an overhead as a direct cost and your gross margin looks worse than it is. Misclassify a direct cost as an overhead and your jobs look more profitable than they really are, which leads straight to underpricing.
Fixed and Variable Overheads
Overheads are not all the same shape. Some stay flat regardless of how busy you are, and some move with activity. This is the fixed versus variable distinction, applied specifically to your running costs.
Fixed overheads stay the same within a normal range of activity. Rent is the classic example. Whether you turn over £10,000 or £40,000 this month, the rent on your unit does not budge. Insurance premiums, most software subscriptions, and salaried admin staff behave the same way.
Variable overheads rise and fall with activity, even though they are still not tied to a single unit of output. The electricity bill in a workshop climbs when the machines run more hours. Delivery and packaging costs grow as order volumes grow. These are overheads, because you cannot pin them to one specific product, but they are not fixed, because they flex with how much you do.
The reason this matters is that fixed overheads are the dangerous ones in a downturn. When sales fall, your variable costs fall with them, but your fixed overheads keep arriving at full size. A business with high fixed overheads needs a higher level of sales just to break even, which is why understanding your cost structure, covered in our guide to fixed costs versus variable costs, is the groundwork for almost every pricing and survival decision you make.
A Worked Example
Take a small design agency with three staff over a single month.
- Revenue: £30,000
- Direct costs (freelancers hired for specific client projects): £6,000
- Gross profit: £24,000
Now the overheads:
- Office rent and rates: £2,500
- Salaries of the two permanent designers and admin: £12,000
- Software and subscriptions: £900
- Insurance: £300
- Utilities and broadband: £400
- Marketing: £700
- Accountancy and other professional fees: £300
Total overheads: £17,100
Subtract the overheads from the gross profit and the agency's net profit is £24,000 minus £17,100, which is £6,900 for the month. The sales did the visible work, but the £17,100 of overhead is what every pound of gross profit had to clear before any of it became profit. If a slow month pushed revenue down so that gross profit fell to £15,000, those same overheads would turn the month into a £2,100 loss, even though the business sold plenty. That is the quiet power of overheads, and the reason they deserve attention before a downturn forces it.
How to Calculate an Overhead Rate
Knowing your total overhead is useful. Knowing how much overhead each hour of work or each unit carries is what lets you price properly. That is what an overhead rate, sometimes called overhead absorption, does.
The simplest version spreads total overheads across a chosen activity measure, usually labour hours:
Overhead rate = Total overheads / Total activity (such as billable hours)
Take the design agency above. Its £17,100 of monthly overhead, spread across, say, 450 billable hours in the month, gives an overhead rate of £38 per hour. That means before the agency has paid the freelancer or made any profit, every billable hour needs to recover £38 just to cover the cost of being open. Add the direct cost and the profit margin you want on top, and you have a defensible hourly rate rather than a guess.
The activity measure does not have to be hours. A manufacturer might absorb overheads per unit produced or per machine hour. The principle is the same: take the cost of being in business and share it fairly across whatever drives your work, so that no job is quietly sold at a price that fails to cover its slice of the rent.
Practical Ways to Control Overheads
Overheads tend to grow by accident. A subscription added for a trial and never cancelled, an office kept at the size you needed two years ago, an insurance policy that auto-renewed without a quote. The control problem is rarely one big cost. It is the slow accumulation of small ones nobody is watching.
A few habits keep them in check. Review every recurring subscription at least twice a year and cancel what is not earning its place. Re-quote insurance, energy, and key supplier contracts on renewal rather than rolling over. Watch the ratio of overheads to revenue over time, because a figure that creeps upward as a share of sales is the early warning that costs are outrunning growth. And separate genuinely fixed overheads from variable ones, so that when you need to cut, you know which costs will actually fall and which will keep arriving regardless.
The goal is not to run lean for its own sake. Some overheads, good software, the right insurance, a capable bookkeeper, save far more than they cost. The goal is to make every overhead a decision rather than a default.
Our View: Overheads Are a Pricing Problem Before They Are a Cost Problem
In our experience, owners reach for overheads only when money is tight, and treat them purely as something to cut. That is the wrong frame. By the time you are cutting overheads in a panic, the damage is already done.
The better way to think about overheads is as the number that sets your minimum viable price. If you know your overhead rate, you know the floor under every quote, and you stop accepting work that looks busy but never covers its share of the cost of being open. Most businesses that struggle despite plenty of sales are not suffering from high overheads in the abstract. They are pricing as if those overheads did not exist. Get the overhead figure clear, fold it into your pricing, and the cost problem largely takes care of itself.
How IAK Can Help
We make your overheads visible and useful rather than something you discover at year end. Clean bookkeeping records and categorises every running cost so your overhead figure is accurate rather than estimated, management reporting tracks overheads against revenue month to month and flags the ones drifting upward, and our accounting work produces a profit and loss account where direct costs and overheads sit correctly, so your gross and net margins both tell the truth.
If you are not sure whether your prices actually cover the cost of being in business, that is exactly the question your overheads answer. Contact us and we will help you work it out.
Sources
- FRS 102, the financial reporting standard for most UK small and medium companies, which underpins how operating expenses are presented in the profit and loss account. Published by the Financial Reporting Council.
- GOV.UK guidance on business expenses if you are self-employed, which sets out which running costs are allowable against tax.
- HMRC guidance on the cash basis and recording business costs, relevant to how overheads are accounted for by smaller businesses.