MOD Tax Refund for Armed Forces (2026-27)

If you serve in the UK Armed Forces, you're likely entitled to claim back tax on work-related expenses that HMRC hasn't automatically refunded. The most valuable claim is Mileage Allowance Relief (MAR) for travel to temporary postings—each posting must be under 24 months to qualify. Most service personnel can claim £2,500–£3,500 over a four-year backdated window, covering travel, professional subscriptions, uniform cleaning, and certain training costs. You'll use form P87 if your annual claim is under £2,500; otherwise you'll need a Self Assessment return. This guide explains exactly what you can claim, how the rules work, and how to submit your claim.

What is a MOD tax refund?

A MOD tax refund (sometimes called an "Armed Forces tax rebate") is money HMRC owes you for work expenses you've paid out of your own pocket while serving. Unlike civilian employees who might claim for a laptop or home office, military personnel have unique expense patterns: frequent postings, travel to temporary bases, professional memberships, and uniform upkeep.

HMRC allows you to claim tax relief on these costs. You don't get back the full amount you spent—you get back the tax you paid on that amount. For a basic-rate taxpayer (20%), every £100 of qualifying expenses returns £20. For higher-rate taxpayers (40%), it's £40 back per £100 spent.

The relief is called Mileage Allowance Relief for travel, and Employment Expenses Relief for other costs. Both fall under the same claim process.

Who can claim?

You can claim if you're:

• A current or former member of the Royal Navy, Army, Royal Air Force, or Royal Marines
• Employed under PAYE (which all regular service personnel are)
• Paying UK income tax
• Incurring qualifying expenses that your employer (the MOD) hasn't already reimbursed

Reservists can also claim, provided they meet the same conditions during periods of mobilisation or training.

The 24-month temporary workplace rule

This is the cornerstone of Armed Forces mileage claims. HMRC treats a posting as a temporary workplace if you're assigned there for less than 24 months. Travel to a temporary workplace qualifies for Mileage Allowance Relief; travel to a permanent workplace does not.

How HMRC defines temporary vs permanent

A workplace is temporary if, at the time you start attending it, you expect to be there for less than 24 months and you actually are there for less than 24 months [ITEPA 2003 s. 339]. If your posting order says "12-month tour" and you complete it in 12 months, that's temporary. If you're posted somewhere with no fixed end date, or for 24 months or longer, it's permanent.

Key point: Each new posting resets the clock. If you're posted to RAF Brize Norton for 18 months, then posted to HMS Raleigh for 15 months, both are temporary workplaces. You can claim mileage for travel to both.

What counts as "travel to" the temporary workplace?

You can claim the mileage between:

• Your home and the temporary base, or
• Your permanent base (if you have one) and the temporary base

Most service personnel claim home-to-temporary-base mileage, especially when posted away from their usual unit.

Example: Corporal James lives in Plymouth. He's posted to Catterick Garrison for 18 months. The round trip is 640 miles. He travels home every two weeks (26 trips per year). His claimable mileage is 640 × 26 = 16,640 miles per year. At 45p per mile (the HMRC Approved Mileage Allowance Payment rate for the first 10,000 miles) and 25p thereafter, his relief is:

• First 10,000 miles: 10,000 × 45p = £4,500
• Remaining 6,640 miles: 6,640 × 25p = £1,660
• Total mileage value: £6,160 per year

If James is a basic-rate taxpayer, his refund is 20% of £6,160 = £1,232 per year. Over 18 months, that's roughly £1,850.

What expenses can you claim?

1. Mileage Allowance Relief (MAR)

This is the big one. You can claim:

• Car or motorcycle travel to temporary postings (under 24 months each)
• Home-to-base travel when you're required to return to your permanent base on rest days or leave
• Travel for temporary duties such as courses, exercises, or detachments under 24 months

Rates for 2026-27:

• Cars/vans: 45p per mile for the first 10,000 miles in the tax year, then 25p per mile
• Motorcycles: 24p per mile
• Bicycles: 20p per mile

You cannot claim for:

• Travel to a permanent base (24 months or longer)
• Commuting to your normal place of work
• Private mileage (holidays, personal errands)
• Journeys the MOD has already reimbursed (e.g., via Get You Home Travel or duty travel warrants)

2. Professional subscriptions and memberships

If you pay for membership of a professional body relevant to your role, you can claim tax relief. Common examples:

• Chartered Management Institute (CMI)
• Institution of Engineering and Technology (IET)
• Royal Aeronautical Society
• British Computer Society
• Nursing and Midwifery Council (NMC) registration for military nurses

HMRC maintains an approved list [List 3, HMRC internal manual]. If your subscription is on the list and you pay it yourself (not reimbursed by the MOD), you can claim.

Example: Flight Lieutenant Sarah pays £180 per year for RAeS membership. As a 40% taxpayer, she claims 40% of £180 = £72 per year in tax relief.

3. Uniform cleaning and maintenance

If you're required to wear uniform and you pay for cleaning or maintenance yourself, you can claim a flat-rate deduction. For Armed Forces personnel, HMRC typically allows £60–£100 per year, depending on your role and the amount of uniform upkeep required.

You don't need receipts for flat-rate expenses—HMRC accepts the standard amount. If your actual costs are higher and you have receipts, you can claim the actual amount instead.

4. Training and course travel

If you're sent on a course or training exercise at a location you attend for less than 24 months, and you travel there from home (not from your permanent base), you may be able to claim mileage. This overlaps with MAR—the same 24-month rule applies.

5. Other qualifying expenses

Less common, but claimable if relevant:

• Tools and equipment you're required to buy for your role (not provided by the MOD)
• Professional indemnity insurance if required for your duties
• Home office costs if you're required to work from home regularly (rare for service personnel, more common for MOD civil servants)

How much can you claim back?

The average Armed Forces tax refund is £2,500–£3,500 over a four-year backdated claim. This assumes:

• Two or three temporary postings during that period
• Regular home travel (fortnightly or monthly)
• A couple of professional subscriptions
• Uniform allowance

High-mileage personnel—especially those posted to Scotland, Northern Ireland, or overseas bases requiring UK travel—can claim significantly more. Some claims exceed £5,000 over four years.

Your refund depends on:

1. Your mileage: More miles = bigger claim
2. Your tax rate: Higher-rate taxpayers get more back (40% vs 20%)
3. How many temporary postings you've had: Each new posting under 24 months adds to your claim
4. Other expenses: Subscriptions and uniform costs add up over four years

The four-year backdating rule

You can claim tax relief for the current tax year plus the previous four tax years. As of 2026-27, that means you can claim back to 2022-23.

Tax years you can claim for in 2026-27:

• 2026-27 (current year, partial if claiming mid-year)
• 2025-26
• 2024-25
• 2023-24
• 2022-23

If you left the Armed Forces in 2024, you can still claim for years you served, provided they fall within the four-year window.

Important: The four-year clock starts from the end of the tax year you're claiming for, not from today. If you're claiming in January 2027, you can claim back to 2022-23 (which ended 5 April 2023). Wait until April 2027, and you lose 2022-23.

How to claim: P87 vs Self Assessment

P87 form (for claims under £2,500 per year)

If your total claim for each tax year is under £2,500, use form P87 (Tax Relief for Expenses of Employment). This is the simpler route.

How to submit P87:

1. Download the form from GOV.UK or complete it online via your Personal Tax Account
2. Fill in your employment details (MOD, your service number, your unit)
3. List your expenses: mileage (calculate total miles × rate), subscriptions, uniform allowance
4. Sign and date
5. Post to HMRC or submit online

HMRC typically processes P87 claims within 8–12 weeks. They'll adjust your tax code for future years and send a cheque or bank transfer for backdated years.

Self Assessment (for claims over £2,500 per year)

If any single tax year's claim exceeds £2,500, you must use a Self Assessment tax return (SA100). This is more detailed but handles larger claims.

How to submit via Self Assessment:

1. Register for Self Assessment if you're not already registered (you'll need a Unique Taxpayer Reference)
2. Complete the SA100 return for each year you're claiming
3. Include the Employment pages (SA102) and detail your expenses
4. Submit online by 31 January following the end of the tax year (e.g., 31 January 2028 for 2026-27)

Self Assessment is more complex. Many service personnel use a tax refund specialist or accountant for SA claims.

Common mistakes to avoid

1. Claiming for permanent postings

If you're at a base for 24 months or longer, it's a permanent workplace. Travel there is ordinary commuting—not claimable. Check your posting orders to confirm the duration.

2. Claiming mileage the MOD already reimbursed

If you used Get You Home Travel (GYH) allowances or duty travel warrants, you can't double-claim. Only claim mileage you paid for yourself.

3. Using the wrong mileage rate

HMRC's rates are 45p/25p for cars, 24p for motorcycles. Don't use the MOD's rates (which differ) or make up your own.

4. Forgetting to split the 10,000-mile threshold

The first 10,000 miles in the tax year (not per posting) are at 45p. After that, it's 25p. If you claim 15,000 miles, it's (10,000 × 45p) + (5,000 × 25p) = £4,500 + £1,250 = £5,750, not 15,000 × 45p.

5. Claiming for years outside the four-year window

You can't claim for 2021-22 or earlier in 2026-27. The window closes. Claim promptly.

6. Not keeping records

HMRC can ask for evidence: posting orders, mileage logs, subscription receipts. Keep records for at least six years after the claim.

Step-by-step: How to make your claim

Step 1: Gather your documents

• Posting orders for each temporary posting (under 24 months)
• A mileage log or estimate (home to base, round trip, number of journeys)
• Receipts for professional subscriptions
• Your P60s for each tax year you're claiming

Step 2: Calculate your mileage

For each tax year:

• List each temporary posting
• Calculate round-trip miles (use Google Maps or a route planner)
• Count how many trips you made (weekly, fortnightly, monthly)
• Multiply miles × trips = total miles
• Apply the 45p/25p rates

Step 3: Add other expenses

• Professional subscriptions (annual cost)
• Uniform allowance (£60–£100 per year)
• Any other qualifying costs

Step 4: Choose P87 or Self Assessment

• Under £2,500 per year? → P87
• Over £2,500 in any year? → Self Assessment

Step 5: Submit your claim

• P87: Online via Personal Tax Account or by post
• Self Assessment: Online via HMRC's SA portal

Step 6: Wait for your refund

HMRC typically responds within 8–12 weeks. If they need more information, they'll write to you.

What to do next

If you want to claim yourself:

• Download form P87 from GOV.UK
• Use the calculations in this guide to work out your mileage and expenses
• Submit your claim online or by post

If you have specific questions about your situation:

• Use the AI Tax chat at myaitax.info for instant answers tailored to your circumstances (e.g., "I was posted to Germany for 18 months—can I claim mileage for flights home?")

If you want someone to handle the entire claim for you:

• Book a consultation with AI Accountant at myaitax.info. They'll gather your details, calculate your maximum refund, and submit everything to HMRC on your behalf. Especially useful for Self Assessment claims or complex posting histories.

References and further reading

• HMRC Employment Income Manual EIM31830 (Mileage Allowance Relief)
• Income Tax (Earnings and Pensions) Act 2003 s. 339 (temporary workplace definition)
• HMRC List 3 (approved professional bodies)
• Form P87: GOV.UK search "P87 tax relief"

Armed Forces personnel are among the most under-claimed groups for tax relief. If you've had temporary postings in the last four years, you almost certainly have money waiting at HMRC. The process is straightforward, the rules are clear, and the average refund of £2,500–£3,500 is well worth an hour of your time.