GUIDE

Tracking business expenses when you are self-employed

If you are self-employed, tracking expenses is not optional — it is how you know whether your business is profitable, what you can legitimately claim, and what you owe in tax. But "tracking expenses" sounds like a job for a bookkeeper with specialised software, not for someone whose main work is something else entirely.

The reality is simpler. You do not need complex software or an accounting qualification. You need a system that matches how your money actually moves. Here is how to build one.

01 / THE ONE-CHANGE SYSTEM

Separate your business money

The single most effective thing you can do for expense tracking is open a separate bank account for your business. It does not need to be a "business account" with monthly fees — a second personal current account used solely for business transactions works fine in most cases.

When your business income goes into one account and your business expenses come out of the same account, your bank statement becomes a near-complete record of your business activity. No more scanning a personal statement trying to remember which transactions were for the business and which were groceries. The statement tells you.

If you already mix personal and business in one account, do not panic. You can still create an accurate record — it just takes a few extra minutes per transaction to tag which is which. And once you start the new account, the old one becomes a closed chapter you only need to deal with once.

02 / WHAT TO TRACK

The short list

You do not need to categorise every transaction into twenty tax buckets. For a self-employed person, the useful categories are usually just a handful:

• Income — money received from clients, customers, or platforms.
• Materials and supplies — things you buy to produce your product or deliver your service.
• Software and subscriptions — tools you pay for monthly or annually.
• Travel and transport — fuel, train tickets, parking, accommodation for business trips.
• Office and equipment — rent, internet, phone, hardware, furniture.
• Professional services — accountants, lawyers, consultants, platform fees.

That is it. Most self-employed people can track 90% of their transactions with those six buckets. If something does not fit, create a "Miscellaneous" category and move on. Perfection is the enemy of progress.

03 / THE WEEKLY REVIEW

Fifteen minutes, once a week

The difference between expense tracking that works and expense tracking that falls apart is frequency, not complexity. A weekly 15-minute review of your bank statement does more for your records than a full-day quarterly session.

Here is what to do in those 15 minutes:

1. Open your business bank statement for the week.
2. For each new transaction, note the category from the list above.
3. If a receipt or invoice is available, save it to a digital folder. If not, add a short note about what the payment was for.
4. If a transaction raises a question (is this for a specific client? is it personal or business?), decide it now or write the question down for your accountant.

That is the whole system. Weekly, not monthly. Fifteen minutes, not an afternoon. The transactions are fresh and the decisions are easy.

04 / WHEN YOU FALL BEHIND

How to catch up without starting over

If you are reading this because tracking expenses has become a nightmare and you are months behind, the weekly review advice does not help you yet. You need a catch-up plan first.

The principle is the same as the weekly review, but applied backwards: take your bank statements from oldest to newest, work through them one month at a time, and for each month identify the key transactions — flagged receipts, recurring bills, unusual items — rather than trying to categorise every single line on the first pass.

A catch-up plan tool like Catchupbooks automates this. Drop in your bank CSV, set a receipt threshold and your preferred session pace, and the plan tells you what each month needs. You work through the months one by one until you are current. Then you switch to the weekly review system and never fall behind again.

Generate your catch-up plan →

05 / WHAT THIS SYSTEM DOES NOT DO

And why that is intentional

This system tracks what happened — the date, amount, payee, and category of every business transaction. It does not determine which expenses are deductible or claimable. That depends on your country, your tax regime, your business structure, and your specific circumstances. No tool and no generic guide can give you that answer, because the answer varies from person to person.

What a good tracking system does give you is an organised, accurate record that you — or your accountant — can use to answer those questions. A clean month-by-month list of transactions with notes is infinitely more useful than a drawer full of receipts and a vague sense of what you spent.