Educational use only. Not financial, investment, tax or legal advice.

Savings Calculator UK

See how your savings will grow over time with compound interest. Calculate your final balance and track your wealth accumulation.

Your Savings Details

0%5%10%15%
1 year10 years20 years40 years
Compound Frequency

Your Savings Projection

Understanding Compound Interest

Compound interest is often called the eighth wonder of the world. Albert Einstein reportedly called it "the most powerful force in the universe."

Exponential Growth

Unlike simple interest, compound interest earns returns on both your initial deposit and previously earned interest, creating accelerating growth over time.

Time is Your Friend

The longer you leave your savings to compound, the more dramatic the growth. Starting early gives your money more time to grow exponentially.

Consistency Matters

Regular monthly contributions significantly boost your final balance. Even small amounts add up over time with the magic of compound interest.

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With Delphina, you can:
  • Track multiple savings goals
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  • Monitor compound growth
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Frequently Asked Questions

How the savings calculator works

The calculator grows your initial deposit with compound interest and adds your monthly contribution throughout each year. Interest is compounded monthly or annually, depending on the option you choose, at the fixed rate you enter.

The yearly breakdown separates what you paid in from the interest earned, so you can see compounding take over the longer you save.

What the results mean

  • Final balance: what your savings could be worth at the end of the period if the rate stays the same.
  • Total contributions: your deposit plus every monthly payment.
  • Total interest: the difference between the two, before any tax.

Assumptions to keep in mind

  • Rates on most savings accounts change over time, and fixed-rate deals end, so treat a long projection as a guide.
  • Interest is shown before tax. Outside an ISA, the Personal Savings Allowance lets basic-rate taxpayers earn £1,000 of interest a year tax-free, higher-rate taxpayers £500, and additional-rate taxpayers nothing.
  • The figures are not adjusted for inflation, which reduces what the final balance will buy.