How to Claim Bad Debt Tax Relief UK: Freelancer's Complete Guide 2026

You did the work. You sent the invoice. The client ghosted.

Now you're staring at an unpaid invoice you'll probably never collect — and it stings twice. Once because you're out of pocket, and again because you still owe tax on that income you never received.

But here's the good news: you can claim bad debt tax relief in the UK and reduce your tax bill for genuinely irrecoverable debts.

This guide covers everything UK freelancers need to know about writing off bad debts for tax purposes — what qualifies, how to claim it, and the HMRC requirements you must meet.

What Is Bad Debt Tax Relief?

Bad debt tax relief allows UK freelancers (sole traders and limited companies) to deduct unpaid invoices from their taxable profit if the debt is genuinely irrecoverable.

In plain English: if a client owes you £2,000 and won't pay, you can write it off and reduce your taxable income by £2,000 — saving you roughly £400-£900 in tax (depending on your tax bracket).

This isn't a loophole — it's a legitimate HMRC provision that prevents you from paying tax on money you never actually received.

Who Can Claim Bad Debt Tax Relief?

Sole traders: Yes — claim it as a business expense on your Self Assessment tax return.
Limited companies: Yes — deduct it from your corporation tax.
Cash basis accounting: No — you can't claim bad debt relief if you use cash basis accounting, because you only declare income when it's actually received (so unpaid invoices aren't taxed in the first place).

If you use traditional accrual accounting (common for VAT-registered freelancers or those with turnover over £150k), you do pay tax on unpaid invoices — so bad debt relief is essential.

What Qualifies as a Bad Debt for Tax Relief?

HMRC won't let you write off a debt just because a client is slow to pay. To claim bad debt tax relief, the debt must be:

1. Genuinely irrecoverable. You've tried to collect it and failed (more on this below).
2. Previously included in your taxable income. You can't write off something you never declared.
3. A trading debt. It must be owed for work you did as part of your freelance business (not a personal loan to a mate).
4. Written off in your accounts. You must formally write it off in your books in the tax year you claim relief.

What Counts as "Genuinely Irrecoverable"?

HMRC expects you to have made reasonable efforts to recover the debt before writing it off. That means:

• You've sent multiple payment reminders (see our 5-email late payment sequence)
• You've sent a formal Letter Before Action (use our free template)
• The client has gone insolvent, liquidated, or dissolved
• The client has disappeared and you can't trace them
• The cost of legal action exceeds the debt value

What doesn't qualify:

• Client is just slow to pay (not irrecoverable yet)
• You haven't chased the invoice properly
• You're writing off the debt for convenience, not because it's truly lost
• The invoice is under 6 months old (HMRC may challenge this)

How to Claim Bad Debt Tax Relief (Step-by-Step)

Step 1: Make Reasonable Attempts to Recover the Debt

Before writing off the debt, you must try to collect it. At minimum:

1. Send 3-5 payment reminder emails (see our polite reminder templates)
2. Send a formal Letter Before Action
3. Check if the company is still trading (search Companies House)
4. Consider Small Claims Court if the debt is under £10,000 (read our Small Claims Court guide)

If all of this fails, the debt is likely irrecoverable.

Step 2: Write Off the Debt in Your Accounts

Formally record the bad debt write-off in your accounting records. If you use accounting software (Xero, QuickBooks, FreeAgent), there's usually a "write off invoice" or "bad debt" option.

If you keep manual records, create an entry like:

This must happen in the tax year you're claiming relief. If you write it off in 2026/27, you claim the relief on your 2026/27 tax return.

Step 3: Claim the Relief on Your Tax Return

For sole traders:

• Include the bad debt write-off as a business expense on your Self Assessment tax return
• Use the "Other business expenses" box (SA103F) or include it in your full accounts if you submit those
• Label it clearly: "Bad debt relief — [Client name] — Invoice [number] — [amount]"

For limited companies:

• Record the bad debt as an expense in your annual accounts
• It reduces your taxable profit and therefore your corporation tax bill
• Your accountant will include it when filing your CT600

Step 4: Keep Evidence

HMRC can query bad debt claims, especially for large amounts. Keep evidence for at least 5 years:

• The original invoice
• All payment reminders and chaser emails
• Letter Before Action (proof of postage if sent by mail)
• Companies House dissolution notice (if applicable)
• Notes of phone calls or meetings
• Legal advice or debt collection correspondence

If HMRC asks, you need to prove the debt was genuine, included in your income, and genuinely irrecoverable.

What About VAT on Bad Debts?

If you're VAT-registered, you can also claim VAT bad debt relief — separate from income/corporation tax relief.

VAT bad debt relief rules:

• The debt must be at least 6 months old (from the payment due date)
• You must have already paid the VAT to HMRC on your VAT return
• The debt must be written off in your accounts
• Claim it on your VAT return (Box 4 — "VAT reclaimed on bad debts")

Read HMRC's VAT Notice 700/18 for full rules.

Common Mistakes to Avoid

1. Writing off a debt too early
If you write off a debt after one reminder email, HMRC will likely reject your claim. Show genuine collection efforts first.

2. Not keeping evidence
"Client ghosted me" isn't enough proof. Keep emails, letters, and notes.

3. Writing off the debt in the wrong tax year
You must write it off in the year you claim relief. If you write it off in March 2027 but claim it on your 2025/26 return, HMRC will disallow it.

4. Claiming relief on cash basis accounting
If you use cash basis (most freelancers under £150k do), you can't claim bad debt relief — because you never paid tax on the unpaid invoice in the first place.

5. Claiming relief then getting paid later
If the client pays after you've claimed relief, you must declare it as income in the year you receive it. Otherwise, you've claimed a deduction for money you eventually received — which is tax fraud.

Should You Hire a Debt Collection Agency First?

Before writing off a debt, consider using a debt collection agency. They work on a no-win, no-fee basis (typically 10-25% of recovered debts) and can recover debts you thought were lost.

When to use a collection agency:

• Debt is over £1,000 (worth the fee)
• Client is still trading but ignoring you
• You don't want the hassle of Small Claims Court

When to skip it and write off:

• Client company has dissolved
• Debt is under £500 (not worth agency fees)
• Client has no assets (insolvent)

If the agency fails to recover the debt, you've strengthened your HMRC claim — you can prove you hired professionals and still couldn't collect.

How Much Tax Will You Save?

The tax saving depends on your tax bracket:

Plus, if you're VAT-registered, you reclaim the VAT (another 20% of the net amount).

Final Thoughts: Don't Leave Money on the Table

If you're sitting on unpaid invoices that are genuinely irrecoverable, you could be overpaying tax.

Here's what to do now:

1. Review your unpaid invoices (use our Invoice Follow-Up Automator to track them)
2. Make final collection attempts (reminders + Letter Before Action)
3. If truly irrecoverable, write off the debt in your accounts
4. Claim bad debt tax relief on your next tax return
5. Keep all evidence in case HMRC queries it

The average UK freelancer writes off 2-3% of annual invoices as bad debts. If you earned £50,000 last year, that could be £1,000-£1,500 in bad debt tax relief — worth £200-£600 in tax savings.

Don't pay tax on money you never received.