What a back office actually costs you

Most owners can name their back office costs to the dollar. Accounting software, a payroll subscription, a bookkeeper for ten hours a month, maybe an assistant. Add it up and it lands somewhere manageable, which is why the number rarely gets questioned.

It is also the smallest part of what the back office costs.

The part that arrives as an invoice

Start with what shows up on the card statement, because it is the only part that bothers to announce itself. Software. The bookkeeper. Whatever tool handles expenses. It has a date, an amount, and a line in the accounts, so it gets tracked.

Every other cost in this article arrives as something else. A Sunday evening. A decision made a week late. A person handing in their notice.

Your own hours, priced honestly

The biggest line is the time you spend on it, and most owners undercount it badly. Not because they are careless, but because the work does not come in blocks. It comes in ten minutes here, twenty there, a question from the bookkeeper, a supplier chasing an invoice, an hour on a Sunday because that was the only quiet time.

Counting it is simple and slightly uncomfortable. For two weeks, write down every time you touch something that is not the actual business: approvals, chasing, reconciling, filing, answering a question about a number. Add it up and halve nothing. Then put a rate on that hour. Not what you pay someone else. What an hour of your attention is worth when it is pointed at the work only you can do.

Whatever you get, that is the real recurring cost, and it does not appear anywhere in your accounts.

The cost of one person knowing

Ask what happens to invoicing if the person who does it is away for two weeks. If the answer is that it waits, or that you do it, then the process is not a process. It is one person’s habit, and you are carrying the risk of it.

That cost stays at zero for a long time and then arrives all at once: the month somebody is ill, or resigns, or goes on leave at quarter end. Work that took them forty minutes takes their replacement a day, because nothing was written down. It is the least visible cost on this list and usually the largest single one when it lands.

Decisions made on old numbers

If your books close three weeks after month end, every decision you make in those three weeks is made on last month’s picture. Hiring, pricing, whether to take the next job. None of those are wrong because the numbers are wrong. They are wrong because the numbers are late.

This one resists measurement, which is why it gets left out. You cannot put a figure on the deal you priced badly in week two. You can notice how often you say some version of “let me check” and then do not check.

Hiring, when you get there

The cost of hiring is not the salary. It is the weeks of your time finding the person, the ramp before they are useful, the management they need afterwards, and the risk that in a year you are doing this again. That last part is the one people forget when they compare a hire to an outside team: the hire is not a one time cost, it is a cost you may repeat.

Do the arithmetic on your own numbers

There is no benchmark worth quoting here. The honest version of this exercise uses your hours and your rate, because the same back office is two hours a week in one business and fifteen in another, and any average would be wrong in both.

The calculator below does the arithmetic and nothing else. It runs in your browser, it stores nothing, and it sends nothing anywhere.

What it deliberately leaves out: the software bill, recruitment, cover when someone is away, and the cost of deciding late. Those are real and they are all additive. Treat the number you get as a floor.

What to do with the number

Once you have it, the question changes shape. It stops being whether you can afford help and becomes which hours you are buying back first, and whether the work is worth doing at all.

That last one matters more than it sounds. Some of what you counted should be automated rather than handed to anyone, and some of it should simply stop. Working out which is which is the next piece, and it is the one that decides whether the number you just calculated actually goes down.