Savings Goal Calculator
Enter your savings goal and target date to find out how much to save each month — with or without interest.
How Savings Goal Calculator works
Savings goal formula
Without interest: monthly saving = (Goal − Current Savings) ÷ Months. With interest, the formula uses the annuity payment formula: PMT = FV × r ÷ [(1+r)^n − 1], adjusted for the future value of existing savings.
The impact of interest
Even modest interest rates reduce the required monthly saving. At 4% annual interest, saving for a £20,000 goal over 24 months requires £791/month vs £833/month with no interest — saving £1,008 in required contributions.
Frequently asked questions
How much should I save each month for a £20,000 deposit?
Over 24 months with no interest: £833/month. With 4% annual interest: approximately £791/month. The higher your savings account rate, the less you need to save each month.
What is the 50/30/20 savings rule?
Spend 50% of take-home pay on needs, 30% on wants, and save 20%. On £2,500 take-home, that's £500/month in savings. Adjust based on your goals and financial situation.
How do I save faster?
Reduce expenses, increase income, automate savings (direct debit on payday), and use high-interest accounts (ISA, instant access savings, fixed-rate bonds for longer targets).
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