Put a pension calculator on your own website
One line of HTML adds a working UK pension calculator to your site. It is free, there is nothing to sign up for, and nothing your visitors type is collected by anyone, including us.
Pick a calculator
Copy this into your page
Paste it where you want the calculator to appear. The credit line under it is the only condition of use, so please leave it in place.
The script is optional. Without it the calculator still works, it just keeps the fixed height you set rather than growing to fit. It is about 2KB, sets no cookies and loads nothing else.
The only condition
Keep the visible credit line, with a working link to pensionsprout.com, on any page where the calculator appears. That link is what pays for the tool. You are welcome to reword the sentence around it to suit your site.
Beyond that: use it on client sites, use it on as many pages as you like, no charge, no account, no invoice.
Settings
Add these to the end of the calculator address to change how it looks and which one loads.
| Setting | What it does |
|---|---|
calc | pot, self-employed, match or charges. Picks which calculator loads. |
accent | A six-digit hex colour without the hash, for example accent=1f4e79. Recolours the headline figures and highlights to match your brand. |
bg | bg=cream for our off-white background, or leave it out for plain white. |
frame | frame=none removes the border and padding, for when your own card already provides them. |
ref | Your domain, for example ref=yoursite.co.uk. Tags the credit link so we can see which sites send visitors. Optional, and it identifies your site, never your visitors. |
What it does with data
Nothing. Every figure is worked out in the visitor's own browser. There is no form submission, no email capture, no analytics inside the calculator frame, and no cookie set by the embed. That means it does not add anything to your cookie banner or your privacy policy, though your own legal team may want to note the iframe.
Where the numbers come from
The projections use compound growth in today's money at 4%, 5% and 6% a year after inflation, which is a range to explore rather than a forecast. The FCA's central projection rate for providers works out at about 2.9% a year after inflation, and the calculator says so on screen. The State Pension figure is the full new rate of £12,548 a year for 2026/27 (GOV.UK). Tax relief is applied at the 20% basic rate at source. The tax-free lump sum is capped at the £268,275 Lump Sum Allowance. Figures correct as of August 2026, and they are updated here when the rules change, so an embedded calculator stays current without you touching it.
Each calculator carries its own assumptions and the standard FCA and MoneyHelper wording underneath, so the compliance position on your page is the same as ours: information and illustration, not regulated advice.
Common questions
Does it cost anything, now or later?
No. There is no paid tier and no plan to start charging sites that have already embedded it. If that ever changed, existing embeds would keep working on the same terms.
Will it slow my page down?
The iframe loads lazily, so it does not load at all until a visitor scrolls near it. The optional script is about 2KB. Nothing else is pulled in beyond the two Google Fonts the calculator uses.
Can I restyle it to match my brand?
You can set the accent colour, the background and the border with the settings above. Deeper restyling is not possible from outside the frame, for the same reason your visitors' numbers stay private: the two pages cannot reach into each other. If you need something closer to your own design, get in touch and we can talk about it.
Do I have to link back?
Yes, that is the deal. A visible credit with a working link to pensionsprout.com, on each page carrying the calculator. If your site policy is to mark outbound links as nofollow, that is fine and we would still rather have you using it.
Can I embed it on a client's site?
Yes, on the same terms. If you build sites for accountants, advisers or employers, you are welcome to use it as often as you like.
Who is behind it?
Pension Sprout is a small independent UK site that publishes free pension calculators and plain-English guides. It is funded by display advertising, not by selling pensions or passing on leads. There is no product being sold to your visitors. Read more about the site.
Something not working?
Email [email protected] with the page address and we will look at it. If you want a calculator that does not exist yet, say so, because that is genuinely useful to know.
See the calculators first
All four are free to use on our site, with every assumption shown.
Browse the calculators →Pension Sprout provides illustrations and general information only, not regulated financial advice. Projections are not guarantees and real returns will differ. Figures reflect the 2026/27 tax year, correct as of August 2026. For advice tailored to your circumstances, speak to a financial adviser regulated by the Financial Conduct Authority (FCA), or get free guidance from MoneyHelper.