How to use the savings goal calculator
- Enter your savings goal — for example a house deposit or emergency fund.
- Enter what you have already saved toward it.
- Choose how long you have to reach the goal.
- Enter the interest rate your savings account pays.
Formula explained
The calculator finds the monthly deposit (PMT) that satisfies:
Goal = PV × (1 + i)n + PMT × [(1 + i)n − 1] ÷ i
Rearranged:
PMT = [Goal − PV × (1 + i)n] × i ÷ [(1 + i)n − 1]
- PV = current savings, i = monthly rate, n = number of months
- At 0% interest this simplifies to (Goal − PV) ÷ n.
Worked example
To reach 30,000 in 3 years, starting with 2,000 in an account paying 4%, you'd need to save about 727 a month. Interest contributes around 1,840 of the total.
Tips for hitting your savings goal
- Automate it. Schedule a transfer the day after payday.
- Use a separate account so the money isn't spent by accident.
- Shop for a better rate — online banks often pay several times more than high-street accounts.
- Pay off high-interest debt first; see the credit card payoff calculator.