Savings Calculator
Calculate how your savings grow over time with starting balance, regular contributions, compound interest, inflation, and tax estimates.
Savings growth inputs
Use this page to project growth. For a target-based plan, use the Savings Goal Calculator.
Currency
Current savings before future deposits.
Added every month.
Weekly and biweekly deposits are converted to monthly equivalents.
Estimated annual rate before tax.
How often interest is added to the balance.
10 yr
Applied after each 12 months.
Used only when inflation-adjusted value is enabled.
Used only when tax estimate is enabled.
Final savings balance
£44,389
Projected after 10 yr.
Interest earned
£9,389
21.2% of final balance after tax.
Total contributions
£30,000
67.6% of final balance.
Inflation-adjusted value
£34,677
Estimated in today's purchasing power.
Net growth
£9,389
Interest after any estimated tax.
Savings summary
Year-by-year projection
Projection rows are capped at 50 years for readability.
| Year | Starting balance | Contributions | Interest earned | Tax paid | Ending balance | Inflation-adjusted |
|---|---|---|---|---|---|---|
| 1 | £5,000 | £3,000 | £270 | £0 | £8,270 | £8,068 |
| 2 | £8,270 | £3,000 | £403 | £0 | £11,672 | £11,110 |
| 3 | £11,672 | £3,000 | £541 | £0 | £15,214 | £14,127 |
| 4 | £15,214 | £3,000 | £686 | £0 | £18,899 | £17,122 |
| 5 | £18,899 | £3,000 | £836 | £0 | £22,735 | £20,094 |
| 6 | £22,735 | £3,000 | £992 | £0 | £26,727 | £23,047 |
| 7 | £26,727 | £3,000 | £1,155 | £0 | £30,882 | £25,980 |
| 8 | £30,882 | £3,000 | £1,324 | £0 | £35,206 | £28,895 |
| 9 | £35,206 | £3,000 | £1,500 | £0 | £39,706 | £31,794 |
| 10 | £39,706 | £3,000 | £1,683 | £0 | £44,389 | £34,677 |
Support
Savings support layer
Savings growth formula
The projection uses a month-by-month simulation so deposits, tax, inflation, and annual contribution increases can work together.
Compound interest effect
Interest is added according to the compounding frequency, then future interest can build on that larger balance.
Estimate only
Results are planning estimates. Actual rates, fees, tax rules, and account timing can change the outcome.
Interpretation
What these savings results mean
Future savings balance
Your savings project to about £44,389 after 10 yr.
Contribution impact
Regular deposits add £30,000 before interest. Increasing deposits can often matter more than small compounding changes.
Inflation-adjusted estimate
At 2.5% inflation, the projected purchasing-power estimate is £34,677.
Contribution vs interest
Contributions represent 67.6% of the ending balance, while net interest represents 21.2%.
Education
How this savings calculator works
Starting balance
The starting balance is the money already saved before future deposits and interest.
Regular deposits
Weekly and biweekly deposits are converted to monthly equivalents. Quarterly and annual deposits are added at their selected cadence.
Compounding frequency
Daily compounding is approximated month by month. Monthly, quarterly, and annual compounding are applied on those schedules.
Contribution increases
The annual contribution increase applies after each full 12 months in the projection.
Formula
Savings growth formula
Monthly simulation
Balance = Balance + Deposit + Interest - TaxThis calculator simulates each month so contribution frequency, compounding, annual deposit increases, taxes, and inflation can be shown clearly.
Interest earned
Interest = Balance x periodic rateThe periodic rate depends on the compounding frequency selected. Annual compounding applies interest once per year.
Inflation-adjusted value
Real Value = Final Balance / (1 + inflation)^yearsInflation-adjusted value estimates future purchasing power using the inflation rate you enter.
Comparison
Savings Calculator vs Savings Goal Calculator
Savings Calculator
Use this page when you know what you can save and want to estimate how the balance may grow over time.
Savings Goal Calculator
Use the Savings Goal Calculator when you know the target and need a required monthly savings amount.
Limits
Limitations of this estimate
Changing rates
Savings rates and APYs can change, so a fixed rate projection may not match a real account.
Deposit timing
Real accounts may calculate interest from exact daily balances. This calculator uses a clear month-by-month estimate.
Taxes and inflation
Optional tax and inflation inputs are simplified estimates, not tax advice or a complete purchasing-power model.
FAQ
Savings calculator questions
A savings calculator estimates how a starting balance and regular deposits may grow over time with compound interest.