Find out if you owed money from HMRC and how to claim it back, fast.

Millions of UK citizens are unaware of money they are owed from HMRC, from marriage allowance to work expenses and more.

What it’s about?

 From Marriage Allowance to potential tax overpayments. We help you identify, verify, and reclaim what’s rightfully yours from HMRC.


£2M+

couples may be eligible for Marriage Allowance.

£1,256

up to £1,256 backdated over 4 years

£300-£400m

goes unclaimed each year (HMRC).

Why it matters

Marriage Allowance isn’t applied automatically — you need to apply to benefit. By registering now, you can ensure you don’t overpay tax in future and reclaim any overpayments from the last four tax years. Any entitlement older than this is permanently lost, so acting now protects what you can still claim and secures your entitlement going forward.

HMRC Tax Refunds FAQ's

What is an HMRC tax refund claim?

You might be owed money from HMRC for a range of reasons. Our lead claim is Marriage Allowance, but we can also help with tax refunds for things like work clothing allowances, working from home expenses, and childcare tax relief. We make it easy to check what you might be missing and guide you through claiming it—quickly and simply.

Eligibility depends on the type of claim. For Marriage Allowance, you may qualify if you’re married or in a civil partnership and one of you earns less than the Personal Allowance, while the other pays basic-rate tax. 

  • You’ll need: your and your partner’s names, National Insurance numbers, and basic income details. 
  • For other claims, you might need details of your job, employer, or childcare provider. 
  • Where to find it: Payslips, P60s, HMRC letters, your online tax account, or search your emails for “HMRC.” If you’re not sure, don’t worry—we’ll walk you through it step by step.

Marriage Allowance can be worth up to £1,256 backdated over four years. Other tax refunds (like work expenses or childcare) vary, but HMRC pays back everything you’re owed.

Most HMRC refunds arrive within a few weeks, but it can take longer if HMRC needs more information.

How it works?

Check Eligibilty

Answer a few simple questions so we can understand your situation and whether an HMRC claim may be relevant. There’s no obligation, and no cost to check.

Verify Claims

We review the information you’ve provided and explain what it means in plain English — including what applies, what doesn’t, and what your options are.

Submit

If you decide to move forward, we help ensure everything is prepared correctly and submitted to HMRC for you simple and stress free.

Track Outcome

You’re kept informed throughout, with clear updates on progress and outcomes, so you always know where things stand.

Free Check. No Win, No Fee

Check Your Claims Eligibility

We’ll review your eligibility and contact you shortly to confirm the information we need to check your tax refund. You’ll hear from us by phone or email with your next steps.

There’s no obligation — this is just an initial review.

I’m still right at the beginning, but my experience so far has been positive. They went through my details and explained whether it was worth moving forward with a tax claim. It helped having someone talk it through rather than trying to work it out myself online.

Screenshot 2026-01-22 at 16.24.28
Hannah L.

London

HMRC
Mon-Thu: 9am-6pm Fri: 9am-1pm
01270 421 561
Edwin Foden Business Centre, Sandbach. CW11 3AE
hello@simplicity-claims.co.uk
simplicity-claims.co.uk
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