RefundCalculator Editorial Team
UK tax content team
About the team
RefundCalculator is written and maintained by a small UK-based editorial team: tax researchers who source every rate and rule from GOV.UK, HMRC manuals and legislation; writers who turn that research into plain English; and engineers who keep the calculators' maths versioned, tested and honest. No single article belongs to one person — everything carries the team's shared byline and shared accountability.
The division of labour — research, writing, fact-checking, engineering, approval — is described step by step on the editorial team page, and the rules it follows live in the editorial policy and methodology.
Coverage areas
- PAYE and tax codes
- employment expense reliefs
- Construction Industry Scheme (CIS)
- couples' allowances
- pension and student loan rules
Guides by the team (14)
D0 and D1 tax codes explained — 40% & 45%
What D0 and D1 tax codes mean, when they're correct (second jobs, pensions), when they're errors costing you money, Scotland's S D0/S D1 variants, and how to fix them free.
1257L tax code meaning — all about your pay
What the 1257L tax code really means, why £12,570 matters, when the code is right, when it hides an error, how it interacts with second jobs, benefits and past years.
What is income tax? Rates, bands and how it works
UK income tax explained from zero: what counts as income, the Personal Allowance, the 20/40/45 bands, Scotland's six rates, the £100,000 taper, and NI vs income tax.
Professional fees tax relief: claim back your subs
Tax relief on fees to HMRC-approved professional bodies — statutory registrations vs approved lists, what it's worth by tax band, backdating, stacking reliefs, and the free P87 route.
Pension tax relief: the higher-rate top-up
Relief at source explained, how much extra 40% and 45% (and Scottish) taxpayers can personally claim, backdating four years, net pay vs salary sacrifice, and the free routes.
Leaving the UK? Claim your P85 refund
Why leaving the UK mid-tax-year usually triggers a refund, the exact P85 process, worked arithmetic, split-year exceptions, timings and the traps to avoid.
Working from home tax relief: the £6 rule
HMRC's £6-a-week flat rate explained, who qualifies since 2022-23, the COVID years still claimable inside the four-year window, what it's really worth, and the free claim route.
Marriage Allowance: £252 a year couples keep missing
How the £1,260 Personal Allowance transfer between spouses works, the full eligibility checklist (including Scotland), per-year savings, backdating and the free application.
CIS tax rebate guide: claim it yourself, free
How Construction Industry Scheme deductions create refunds averaging four figures, which expenses subcontractors can claim, and the free Self Assessment route step by step.
Mileage tax relief: the 55p rule explained
HMRC's approved mileage rates (55p/25p cars from 2026/27, 45p/25p before; 24p motorcycles, 20p bicycles), which journeys qualify, how employer payments cut the claim, evidence rules and the free route.
Uniform tax rebate: who qualifies and how to claim
HMRC's flat-rate uniform allowance fully explained — eligible jobs, rates by occupation, what the relief is really worth, four-year backdating and the free P87 claim.
UK tax codes explained in plain English
Every common UK tax code decoded — 1257L, BR, D0, D1, K codes, S and C prefixes, W1/M1 emergencies — and the warning signs that a wrong code is costing you money.
P800 tax refunds explained — and how to check first
What a P800 really is, when HMRC sends them, what triggers over and underpayments, how to spot fakes, and the free way to claim what a P800 shows.
How to claim a UK tax refund free from HMRC
Every legitimate UK tax refund can be claimed free from HMRC — online, by phone or by post. Exactly how, what you need, timings, and how refund companies really work.