How to track business expenses (the no-shoebox method)

The shoebox where tax savings go to die

You buy a £40 train ticket for a client meeting. You grab a sandwich on the way. You pick up some cables because an order didn't arrive in time. Three small costs, three paper receipts, and all three end up in the same place: a wallet, a glovebox, or that drawer.

Then they fade. Thermal receipts can go blank within weeks. By the time you sit down to "do the expenses", half are gone and the rest are hard to read. And the longer you leave it, the harder it is to remember what "£18.50, cash, Tuesday" was even for.

That costs real money. Every allowable expense you fail to record is a cost you can't deduct, so you pay tax on money you actually spent on the business.

Tracking expenses isn't about being tidy. It's about not paying extra tax for being busy. This guide covers what to record, what HMRC says about receipts and digital copies, a simple system that works, and what a receipt scanner app should actually do for you.

What tracking an expense actually means

For every business cost, you want the same handful of facts:

• the date you paid;
• who you paid (the supplier);
• how much, and how much of it was VAT, if any;
• what it was for, with a few words on the business reason if it isn't obvious;
• how you paid: business account, personal card or cash;
• the proof: a receipt or supplier invoice;
• the category it belongs in, such as travel, software or equipment.

Most of these are on the receipt itself. The bank or card statement shows the payment but not what you bought, so on its own it rarely tells the full story.

Not every cost is deductible, and some are only partly business. Before you start, it helps to know what you can claim as a business expense, so you capture the right things and don't waste time on the rest.

What HMRC says about receipts and digital copies

You don't have to keep paper

GOV.UK says there are no set rules on how you keep records: you can keep them on paper, digitally or as part of a software program such as bookkeeping software. HMRC can charge a penalty if your records are not accurate, complete and readable. For a limited company, the fine for not keeping accounting records can be up to £3,000.

HMRC's own guidance for its officers goes further on scanning. If you transfer paper records into electronic form, you may throw the paper away, provided your method of storage:

• captures all the information needed to make a correct and complete return; and
• can reproduce that information in a legible form.

If your method can't do both, you must keep the originals as well.

In practice that means a good photo or scan of the whole receipt, flat and in focus, with the supplier, date, items, total and any VAT readable. If anything that matters is printed on the back, capture that too.

A few documents to keep as originals

HMRC expects some documents to be kept in their original form. The most common for small businesses are statements showing tax deducted from payments made to you, such as the payment and deduction statements a contractor gives a subcontractor under the Construction Industry Scheme. Keep those safe.

If you're VAT-registered

You must keep all the invoices you receive, either the originals or electronic copies. To reclaim VAT on a purchase, you need a valid VAT invoice from the supplier. A bank statement line shows that you paid, but not the supplier's VAT number or the VAT charged, so it isn't enough to support a VAT claim on its own.

How long to keep them

• Sole traders: at least five years after the 31 January Self Assessment deadline for the tax year.
• Limited companies: six years from the end of the financial year the records relate to, and longer in some cases, such as assets you keep for years.
• VAT records: at least six years.

There's more detail in what records you legally have to keep, and for how long.

Making Tax Digital for Income Tax

From 6 April 2026, sole traders and landlords with qualifying income over £50,000 must keep digital records in compatible software and send quarterly updates to HMRC. Qualifying income is your gross self-employment and property income before expenses, measured on a previous year's tax return. The threshold falls to £30,000 from April 2027 and £20,000 from April 2028. You still keep receipts as supporting evidence, but the record of each transaction must be digital. See what counts as a digital record under Making Tax Digital.

Four ways to track expenses, compared

Each step down the table moves work from you to the software. The aim is that your only regular job is to take a photo.

A simple system that actually works

1. Keep business spending separate. A business bank account and card mean every business payment is in one place and personal spending stays out of your books.
2. Connect a bank feed. Every card payment then appears in your books without typing. Good software will also suggest the category; see how to categorise bank transactions automatically.
3. Capture receipts the moment you get them. Photograph paper receipts at the till. Send email receipts to one place, rather than leaving them scattered across your inbox.
4. Match each receipt to its payment. This is what turns a photo into evidence: the payment proves you paid, the receipt proves what for.
5. Categorise and record the VAT. Do it while you still remember what the purchase was.
6. Deal with personal spending properly. If you pay for a business cost personally or in cash, record it as an expense claim. If you're a company director, the company then owes you the money, and it's often tracked through your director's loan account until it's repaid.
7. Log business mileage if you use your own vehicle: date, journey, purpose and miles.
8. Spend ten minutes a week clearing anything unmatched or unclear.
9. Check monthly that your records agree with your bank balance.

Steps 3 and 5 are where most people slip, because they rely on memory. They're also the steps good software can take over.

What a good receipt scanner app should do

Your camera roll is probably already full of receipt photos. Good instinct, but a photo isn't a record. It's a picture of a record. Someone still has to read it, type the supplier, amount, date and VAT into your accounts, and work out which bank payment it belongs to.

That's the trap with many receipt scanner apps. "Scanning" sounds as if the software does the work, but some only store the image. You've automated the capture and changed nothing about the effort.

The useful ones use OCR (optical character recognition: software reading the text off a picture) and then carry on. Before you choose one, check that it:

• reads the receipt: supplier, date, total and VAT, not just the image;
• creates the expense in your books, categorised, rather than in a separate list you copy across later;
• matches the receipt to the bank or card payment automatically;
• tells you when it's unsure, and asks only about those, rather than making you check every one;
• keeps the image attached to the transaction for as long as you need to keep records;
• accepts receipts from anywhere: your phone camera, email, PDFs and uploads;
• lets your accountant see the evidence behind each figure without you sending files;
• lets you take your records with you if you ever leave.

If an app does the first four, your part of expense tracking shrinks to one habit: take the photo. If it only does the first, you've bought a tidier shoebox.

Common expense-tracking mistakes

• Relying on the bank statement alone. It shows that you paid, but not what you bought or how much VAT you were charged.
• Claiming the personal part of a mixed cost. Phone, car and home costs often need splitting between business and personal use, and only the business share is deductible.
• Putting personal and business spending on one card, which means sorting every line by hand later.
• Recording the same cost twice, once from the receipt and again from the bank feed. Matching each receipt to its payment prevents it, the same way matching supplier bills to bank payments stops you paying a bill twice.
• Throwing the paper away before checking the copy. Make sure the photo is complete and readable first.
• Saving it all for year-end, when the details are forgotten and the deadline is close.

How Ledgers tracks expenses and receipts

Ledgers is AI bookkeeping for UK small businesses, built so that capturing a cost is the only step you take.

• Snap on your phone. Open Ledgers, tap and photograph the receipt. Ledgers reads the supplier, date, amount and VAT, waits 24 hours for the matching bank transaction, and links the receipt to it when it lands.
• Or send it another way. Drop PDFs into a Ledgers folder in Google Drive, apply a Ledger label to an email in Gmail so its attachments flow in, or drag and drop files on desktop.
• Card statements too. Upload an Amex, Barclaycard or CSV card statement, and receipts paid on that card link up when the statement arrives.
• Categorised for you. Every bank transaction is given an account and VAT treatment. Anything in the grey area goes to your triage queue, and if you make the same call three times it becomes a rule, so Ledgers stops asking.
• A trail behind every number. Click any receipt to see every journal entry it created, which makes answering questions from HMRC or your accountant much quicker.

Bank feed categorisation is on every plan, including Free. Receipt capture starts on Solo at £4.99 a month, with 50 documents a month included, and supplier bills and expense claims come with Starter. The pricing page has the details. If the shoebox is still in your drawer, start tracking your expenses free and add receipt capture when you need it.

The short version

Track every expense in the moment, not at year-end. Record the date, supplier, amount, VAT, purpose and payment method, and keep the receipt as a clear digital copy. HMRC accepts digital records, provided they're complete and readable. Keep them for five years after the 31 January deadline if you're a sole trader, and six years from the end of the financial year if you're a company. Choose a receipt scanner that reads, categorises and matches, not one that only stores photos, and the shoebox can go.