Retirement Calculator

How to use Retirement Calculator

1. Open Retirement Calculator in your browser — it loads instantly and works offline once cached.
2. Enter your values in the input fields. Every field is labelled so you know exactly what to type.
3. The result updates automatically as you type — there is no "submit" round-trip to a server.
4. Adjust any input to compare scenarios and see how the outcome changes in real time.
5. Copy or note the result. Nothing you enter is stored or sent anywhere.

Why use Retirement Calculator?

• 100% free with no limits, no sign-up and no watermarks.
• Private by design — your data are processed in your browser and never uploaded to a server.
• Fast and lightweight, with instant results even on a phone or a slow connection.
• Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
• Part of a full financial calculators suite, so related retirement tasks are one click away.

What people use Retirement Calculator for

• Estimating whether current savings and contributions will support retirement.
• Working out the gap between a projected pot and a target income.
• Testing how retiring a few years later changes the outcome.

Retirement Calculator: limits and things worth knowing

• Projections are extremely sensitive to the assumed return and inflation. Changing either by one percentage point moves a 30-year projection by tens of percent, so treat the output as a range rather than a figure.
• The 4% rule — withdrawing 4% of the pot in year one, then rising with inflation — comes from US historical data over 30-year retirements and is a rule of thumb, not a guarantee. It has been widely debated and does not transfer cleanly to other markets or longer retirements.
• State pension entitlement, workplace schemes and tax treatment vary enormously by country and are not modelled.
• This is an arithmetic projection, not financial advice. A regulated adviser can account for your tax position, which this cannot.

Is it private and secure?

Your privacy is built in. Retirement Calculator runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.

Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.

You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.

Learn more

Why Browser-Based Tools Are Safer for Your Files — Most online converters upload your files to a server. Client-side tools don't. Here's why that difference matters for privacy.