Why site owners embed these
The calculators people ask for by name
Plus 82 more in the category — budgeting, debt payoff, IR35, freelancer rates, stamp-duty-style deal checks and the rest of the money shelf. See all 94 →
Why the numbers can be trusted
The maths is easy to get wrong. The £100,000 personal-allowance taper creates a 60% marginal rate; modelling the basic-rate band as a fixed ceiling instead of a fixed width gets it wrong — and that exact bug has been found in commercial calculator products. Ours is tested against an independent implementation of the published HMRC rules, not against its own logic.
100 independent automated checks run on every deploy. If a change breaks a statutory computation, the build fails before it ships. The figures currently model the 2026/27 tax year: personal allowance £12,570 (frozen to April 2028), basic rate 20% to £50,270, higher rate 40% to £125,140, employee NI 8%/2%.
The update history is public. Statutory changes land with a dated entry in the changelog — the same evidence a buyer needs before trusting an unknown supplier with their clients' numbers.
Pricing — free forever, branded from £99
Embedding is free, forever, no account. The credit line under each tool is the entire price of the free tier. A licence removes it and puts your brand on the tool. Annual; cancel by not renewing; activation is a licence key you paste once.
Free embed
- All 1149 tools, any site
- Small credit line (required)
- No ads, no accounts, no paywalls
Single tool
- One tool, one site
- Credit line removed
- Your logo on the tool
- Statutory updates included
Category
- Every tool in one category — Finance & Money: 94
- Credit line removed, your logo
- Up to 3 sites
- Statutory updates included
Full white-label
- All 1149 tools, unlimited sites
- Your branding throughout
- Self-host option
- Statutory updates + priority fixes
Prices are per year and include statutory updates while active. These calculators are estimating tools, not financial advice: figures are maintained against HMRC's published 2026/27 rules and enforced by 100 independent automated checks on every deploy — see the changelog. Visitors' inputs are processed in their own browser; the embeds collect nothing for us.
Questions, answered plainly
Is it really free to embed?
Yes. Every tool embeds free with a small credit line linking back here — that credit is the entire price of the free tier, and it works as a backlink for you too. No account, no sign-up, no API key.
How do I put a calculator on my site?
Pick a tool, click “Copy iframe”, and paste the snippet into any CMS, page builder or HTML page. It is a single iframe — no JavaScript libraries, no build step, no maintenance beyond keeping the snippet.
Can we remove the credit line and use our own branding?
That is exactly what the licence is for: £99/year for one tool, £299/year for a whole category, £899/year for everything white-label. You get a signed licence key; the credit disappears on your domain only.
Are these calculators financial advice?
No — they are estimating tools, not financial advice. The statutory figures (tax bands, National Insurance, student-loan thresholds) are maintained against HMRC's published 2026/27 rules and enforced by 100 independent automated checks on every deploy. See the changelog for the update history.
What do you collect from our visitors?
The calculators run in the visitor's browser and nothing they type is sent to us — there is no form submission anywhere in the embeds. This landing page itself measures traffic with Google Analytics; the tools record nothing.
Do you host the tools, or do we?
We host by default, so statutory updates reach every embed the day they ship. White-label licensees can additionally self-host the files.