Savings Calculator
Enter your starting balance, monthly contribution, interest rate, and time frame to see how your savings could grow.
Last updated: August 30, 2026
Frequently asked questions
How does compound growth affect savings over time?
Interest earns interest on itself, so the longer your money stays invested, the larger the share of your balance that comes from growth rather than contributions - this effect accelerates in later years.
What interest rate should I use for a savings calculator?
Use your actual account's APY for savings accounts, or a conservative long-term average (historically 4–7%) for investment accounts - check your specific account terms for the current rate.
How do monthly contributions compare to a one-time lump sum?
Regular monthly contributions add up steadily and each one gets fewer years to compound than an early lump sum, so a lump sum invested early generally outgrows the same total amount contributed gradually - though most people find gradual saving far more realistic.
How much do monthly contributions really matter over 20-30 years?
Even modest recurring contributions compound significantly over decades - $200/month at a 6% annual return grows to well over $130,000 in 25 years, most of it from compound growth rather than the contributions themselves. Starting early matters more than the exact contribution amount, since compounding needs time to work.
Is this a 'time value of money' (TVM) calculator?
Yes - this calculator solves for future value given a starting balance, regular contributions, interest rate, and time frame, which is the core time value of money calculation used in savings and investment planning.