UK Tax Companion

Calculators, planners and a smart HMRC news feed — understand what you keep and stay ahead of UK tax. No login; your numbers never leave your phone.

UK Tax Companion is a practical UK tax app. Containing: calculators, planning tools, decision aids, deadlines and a smart regulatory feed. No accounts, no ads, and your numbers stay on your device.

CALCULATORS (2026/27) • Take-Home Pay — see your net salary after Income Tax, National Insurance, pension and student loan, with a clear breakdown of where your pay goes. Supports salary-sacrifice, net-pay and relief-at-source pensions (rest of UK). • Income Tax — model salary, other income, savings interest and dividends together, with correct band stacking, the Personal Allowance taper, the Personal Savings and Dividend allowances, Class 1 NIC, and effective and marginal rates (rest of UK). • Capital Gains Tax — the annual exempt amount, the basic/higher-rate split, and correct handling of current-year losses (used in full) and brought-forward losses (used only down to the exempt amount). • VAT — add or remove VAT at the standard, reduced or zero rate, plus a Flat Rate Scheme calculator with the first-year discount and limited-cost-business rate. • Stamp Duty (SDLT) — residential rates for England & Northern Ireland, including first-time buyer relief, the additional-property surcharge and the non-resident surcharge. • Student Loan — income-contingent repayments for Plans 1, 2, 4, 5 and the Postgraduate Loan.

PLANNING • Pension Planner — size a pension contribution with a slider and see the tax you'd save in real time. Snap to goals like restoring your Personal Allowance, avoiding the High Income Child Benefit Charge, or dropping back to the basic rate. • Sole Trader vs Company — compare taking your profits as a sole trader against running a limited company, with step-by-step workings: Corporation Tax, salary, employer NIC, dividends and the profit you leave in the company.

DECISION TOOLS • Tax Health Check — answer a few quick questions to surface reliefs you may be missing and obligations to act on, each linking to the relevant tool or gov.uk page. • IR35 status indicator — a weighted assessment against the foundational case-law factors, with an HMRC source for every question. • Do I need to file a tax return? — walks HMRC's Self Assessment criteria. • Is my side hustle taxable? — identifies the £1,000 trading allowance and the badges of trade. • Do I need to register for VAT? — the £90,000 registration and £88,000 deregistration thresholds, explained. The IR35, Self Assessment and side-hustle checks explain the position based on what you enter, export a PDF, cite gov.uk, and link to the relevant official HMRC checker.

STAY CURRENT — TAX RADAR • Updates — a live feed of tax content from sources such as HMRC, HM Treasury and gov.uk, automatically tagged by topic and ranked so the changes that matter rise to the top. Big items get a plain-English summary: what changed, who it affects, and from when. Star items to save them; saved items stay available offline. • Personalise it — tell the app your situation (employed, self-employed, company director, landlord, investor) and your feed and deadlines tailor to what's relevant to you. • Deadlines — key UK filing and payment dates with countdowns and direct gov.uk links.

PRIVATE BY DESIGN The figures you enter never leave your device — no accounts, no tracking, no servers of our own. Released builds use anonymous crash diagnostics only.

INFORMATIONAL, NOT ADVICE UK Tax Companion provides indicative calculations and informational content to support your own judgement. It is not tax advice or a Status Determination Statement. Always verify against HMRC guidance and consult a qualified adviser when making decisions.