A down payment, a wedding, a year of runway — every goal becomes a plan once you know the monthly deposit. Set the target and timeframe; we'll work backwards and credit you the interest along the way.
A high-yield savings account currently pays around 4%.
Assumes monthly compounding and deposits at the start of each month. All math runs locally in your browser; nothing is sent to a server.
We start with what you've already set aside and let it grow at your chosen rate. Whatever gap remains to the goal is solved as the future value of a monthly annuity — the equation works backwards to find the exact deposit that lands you on target by the deadline.
The interest line matters more on longer horizons. Stretch the timeframe slider and the required monthly deposit drops twice over: you're spreading the goal across more months and giving compounding more room to work.