What bookkeeping do sole traders actually need to do? It’s one of the most common questions I get, and the honest answer is: less than you probably fear, but more than keeping a few receipts in a drawer.

What Bookkeeping Actually Means for a Sole Trader

Bookkeeping just means keeping a record of the money coming into your business and the money going out. That’s it. You’re not trying to become an accountant. You’re building a picture of what your business is actually doing with money.

Every sole trader in the UK has a legal duty to keep records of their business income and expenses. HMRC requires self-employed people to keep those records for at least five years after the 31 January submission deadline for the relevant tax year. So if you filed your 2024-25 return in January 2026, you need to hold onto the supporting records until at least January 2031.

What Records Do You Actually Need to Keep?

You need to track your income, your allowable business expenses, and any personal income that might be relevant to your Self Assessment. Allowable expenses are things you’ve bought wholly for your business: tools, travel, phone costs, software subscriptions, professional fees and so on. The more accurately you record these, the lower your tax bill.

You don’t need a fancy system to start. A simple record of each invoice you’ve raised, each bank transaction, and each expense receipt will cover the basics. Where people come unstuck is when they leave it six months and then try to piece it all together from memory. Thirty minutes a week is genuinely enough to stay on top of it if you start now rather than later.

Making Tax Digital: What Sole Traders Need to Know

Making Tax Digital for Income Tax (MTD for ITSA) is a change in the way sole traders report income to HMRC. Instead of one annual Self Assessment return, you’ll send quarterly updates through MTD-compatible software. From 6 April 2026, sole traders with qualifying income over £50,000 must use MTD-compatible software. If your income is over £30,000, the requirement kicks in from April 2027.

HMRC won’t provide software for you. You’ll need to pick a compatible option before your start date. The quarterly updates are summaries, not a line-by-line breakdown of every transaction, so it’s less intimidating than it sounds. If you’re already keeping decent records, the extra admin is small. If you’re not, getting organised now means you won’t be scrambling when the deadline arrives.

Spreadsheet or Software: What Actually Works?

A spreadsheet can work perfectly well if you’re under the MTD threshold and you’re consistent with it. I’ve seen sole traders with beautifully organised spreadsheets that make year-end accounts straightforward. I’ve also seen spreadsheets that are essentially financial archaeology. The tool matters less than the habit.

Once MTD applies to you, you’ll need software that can send quarterly updates to HMRC directly. Options like QuickBooks Sole Trader at around £10 a month, or Xero’s entry-level plan at around £16 a month, cover the basics and connect to your bank account. FreeAgent is free if you bank with NatWest, RBS or Mettle. None of these are complicated. Most sole traders I work with are up and running in under an hour.