Bookkeeping for Trades: A 20-Minute Weekly System

Good bookkeeping for a tradesperson is a short weekly routine, not a big annual job: about 20 minutes to capture receipts, check the bank feed, log invoices sent and chase what is overdue. Do it every week and your records stay accurate, your tax bill holds no surprises, and you are ready for Making Tax Digital without a Sunday-night panic.

Why little and often beats a shoebox

Most trades do their books the same way: receipts pile up in the van door pocket, invoices live in a text thread, and everything gets sorted in a frantic weekend before a deadline. The trouble is that memory fades. By the time you sit down, you cannot remember which £84.17 at the merchant was for the Reading bathroom and which was for your own van.

Making Tax Digital for Income Tax is now mandatory for self-employed people with qualifying income over £50,000, and it extends to those over £30,000 from 6 April 2027 and over £20,000 from 6 April 2028. It asks you to keep digital records and send HMRC updates through compatible software. A weekly habit is the simplest way to be ready when your turn comes.

What you need before you start

You only need three things.

A separate business bank account. If your business money and your personal money share one account, every transaction needs a decision. Separate them and the bank feed does half your bookkeeping for you.

Simple accounting software. Any HMRC-recognised package that connects to your bank will do. Pick on price and ease of use, not features you will never touch. Check it is compatible with MTD for Income Tax if that applies to you.

A single place for receipts. That means the app’s photo capture, or one folder on your phone. It does not mean the van door pocket.

The 20-minute weekly routine

Pick a fixed slot. Friday afternoon after the last job, or Monday before the first, both work. Put it in the diary like a customer appointment.

Minutes 1 to 5: receipts

Photograph every receipt from the week and attach it to the matching bank transaction. Better still, photograph each one at the till and let the weekly slot be a check rather than a catch-up. Paper receipts fade, so a photo is also your safety copy.

Do not file receipts by category. Software does that. Your only job is to make sure each purchase has a picture.

Minutes 6 to 10: the bank feed

Open the transactions that landed this week and categorise each one. Materials, fuel, tools, insurance, subcontractors, phone and software cover most of what a trade spends. When a payment is not business, mark it as drawings so it stays out of your costs.

If something is unclear, flag it rather than guessing. A flagged item takes a minute at your next accountant check-in. A wrong guess can sit unnoticed for a year.

Minutes 11 to 15: invoices out

Check that every job finished this week has an invoice raised and sent. This is where small firms lose money quietly: a job done, a promise to “sort the paperwork later”, and a payment that never gets chased. Match each payment received to its invoice so you always know what is paid and what is not.

If you work under the Construction Industry Scheme, record the deduction on each payment from a contractor. CIS deductions are 20% for registered subcontractors, 30% for unregistered and 0% for gross payment status. Keep every deduction statement, because the tax already taken counts towards your bill.

Minutes 16 to 20: the chase list

Look at everything unpaid and past its due date. Send a polite reminder to each one, today. A short message that names the invoice, the amount and the date works better than a vague nudge. For anything more than 30 days overdue, pick up the phone.

Keep the list to a handful of names. If it is longer, the problem is not your routine, it is your payment terms. Shorter terms, stage payments and deposits are all worth a look.

Once a month: a ten-minute extra

On the first working day of each month, spend ten extra minutes on three checks.

First, reconcile your software balance against your bank balance. If they match, you are in good shape. If not, find the gap now while it is small.

Second, glance at your profit for the month. You do not need a spreadsheet, just a feel for whether takings, costs and what is left look sensible.

Third, move a share of every payment into a tax pot. Many trades set aside a fixed percentage of each payment received so the bill never arrives as a shock. Ask your accountant what percentage suits your situation.

What to keep, and for how long

HMRC expects you to keep records that support your tax return: sales, purchases, bank statements and receipts. As a general rule, self-employed people keep them for at least five years after the 31 January submission deadline of the relevant tax year. Check gov.uk if your circumstances are unusual.

Digital copies are fine. A clear photo is generally accepted in place of the paper original, so you do not need a filing cabinet in the shed.

Common mistakes to avoid

Mixing personal and business spending. It costs you hours at tax time and invites questions in an HMRC enquiry.

Leaving receipts to the end of the month. The ones you forget are the ones you cannot claim.

Cash jobs with no record. Every payment still needs recording, and a customer who pays in cash can still be given a proper invoice.

Skipping the routine in busy weeks. A missed week turns into a missed month. Even five minutes on receipts beats nothing.

Never talking to an accountant. Software handles the recording. An accountant advises on structure, expenses and tax planning. A short call once a quarter pays for itself.

When to get help

If the weekly slot still feels like a chore after a month, or your turnover is heading towards a higher MTD threshold or the VAT registration threshold of £90,000, bring in a bookkeeper. Many work remotely on a fixed monthly fee and can take the whole routine off your plate. The aim is not to do everything yourself. It is to know exactly where your business stands.

FAQ

How long does trade bookkeeping really take?

Once the habit is set and receipts are captured as you go, around 20 minutes a week is realistic for a sole trader. A busier firm with subcontractors and materials accounts will need longer, which is when a bookkeeper starts to earn their fee.

Do I need accounting software as a sole trader?

You are not required to use any particular package today, but Making Tax Digital for Income Tax requires digital records and compatible software once it applies to you. Starting now means you learn the system before your deadline.

Can I claim for receipts I have lost?

Sometimes. Your bank statement shows the payment, and you may be able to get a duplicate from the supplier. Without proof, HMRC can refuse the cost. This is the best reason to photograph receipts straight away.

Should I keep business and personal money separate?

Yes. A sole trader is not legally required to open a separate account, but it makes bookkeeping dramatically easier and your records far clearer if HMRC ever asks questions.

What is the minimum I should do each week?

Capture your receipts and send your invoices. If you only do those two, you still protect your claims and your cash flow.

Keep the work coming while you keep the books tidy

Good books tell you what the business earns. Trade Pilot helps with the other half: filling the diary. It is free to join Trade Pilot, only charges when a real local job lands in your inbox, and sells each lead to no more than three trades in an area.

Related reading: Making Tax Digital for trades · best accounting software for MTD · tax deductions for tradesmen · MTD quarterly updates