Savings interest calculator
Find out how much your savings could grow, including interest earned each day but paid into your account later. Set a future cash-out date to see the amount actually available.
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Change the numbers below to see how they affect your estimate. Nothing needs to be saved.
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Try this calculatorAbout this calculator
Find out how much your savings could grow, including interest earned each day but paid into your account later. Set a future cash-out date to see the amount actually available.
How savings interest and payment timing work
Daily interest versus daily payment
A savings provider can calculate interest every day while paying it to your account weekly, monthly or annually. Interest waiting to be paid may not compound in the meantime. This calculator separates interest earned, interest credited and interest not yet credited.
How to use it
Enter your opening balance and the annual equivalent rate (AER), then add any recurring savings amount and its frequency. Select when interest is normally credited. Optionally enter an additional credit delay if your provider has one. Choose a savings period or an exact cash-out date.
How the projection is calculated
For an AER of 3.8%, the daily effective rate is (1.038) raised to the power of 1/365, minus one. Each day, the calculator accrues interest on the credited balance. Accrued interest is queued for crediting at the next selected payment date plus any additional delay. Only after it is credited does it join the balance that earns new interest.
Worked example
With £10,000 saved at 3.8% AER, approximately £1.02 of interest is earned on the first day, before rounding. If interest is credited daily with no delay, it compounds from the next day. If interest is credited monthly, earned interest waits for the monthly credit date. A seven-day delay after the normal credit date makes the available balance temporarily lower.
Withdrawal date and limitations
The result labelled available balance assumes the provider lets you withdraw all credited funds on the selected day. Any interest not yet credited is shown separately. A withdrawal processing delay, weekends, banking cut-off times and account rules can affect when money reaches your bank. This calculator does not forecast those transfer timings. It also does not account for tax, variable rates, promotional conditions or cash held in investment products.
Understanding Trading 212
Check the terms of your specific Trading 212 account before choosing a payout frequency. The interest earned date, interest payment date and the time needed for a withdrawal to reach your bank may be different. Do not assume there is a seven-day delay on earned interest unless your account terms confirm it.
Relevant UK data
Check the official figures behind the wider picture
Frequently asked questions
Is daily interest always paid daily?
No. Some savings products calculate interest daily but credit it monthly or annually. Check your provider's terms.
Does uncredited interest compound?
This calculator assumes it does not compound until it reaches your balance. Providers may apply a different method.
Is the cash-out balance guaranteed to arrive in my bank on that date?
No. It estimates credited funds on the date entered, not withdrawal processing or transfer times.
Is AER the same as a daily interest rate?
No. AER is an annual equivalent rate. The calculator converts it into a daily effective rate and models daily accrual.
Guides for your next step
- Daily savings interest explained: compounding, credit dates and withdrawals
Understand AER, daily accrual, compounding and why money earned is not always money ready to withdraw.