Savings Goal Calculator

Reaching a financial target comes down to two questions: how much to set aside each month, or how long your current contributions will take to get you there. Clear projections make the difference between drifting and actually funding goals like a home down payment, a child's education, or retirement. Concrete numbers turn vague intentions into a plan you can hold yourself to.

At its core the tool applies a compound interest formula built for recurring contributions. To find the required monthly savings, it uses the future value of an ordinary annuity: FV = P * [((1 + r)^n - 1) / r], where FV is the future value you are aiming for, P is the payment each period, r is the monthly interest rate, and n is the number of periods in months. To answer how long a goal will take instead, it solves for n iteratively under the same logic, folding in both an opening lump sum and your ongoing contributions.

One factor the basic model leaves out is inflation, which steadily eats into what your savings can actually buy. If prices rise 3% over the next year, for example, $100,000 reached a year from now buys only what about $97,100 buys today ($100,000 / 1.03), so aim a little higher than the headline figure. Keep your assumed annual return grounded as well, since rosy return estimates set you up for a shortfall. The flip side is encouraging: small, steady contributions have an outsized effect over long stretches once compounding goes to work.