Compound Interest Calculator

Results are estimates based on the inputs you provide and the assumptions listed on this page. The calculator uses standard compound interest math and aligns contribution and compounding frequencies as closely as possible. Real-world returns, timing, and product rules can differ.

The tool projects future value from your initial deposit, nominal annual rate, compounding frequency, years, and optional recurring contributions. It summarizes total contributions, interest earned, and produces a year-by-year schedule.

More frequent compounding credits interest on interest sooner, which generally increases growth. For example, monthly compounding typically yields more than annual at the same nominal rate.

Recurring contributions are added at the frequency you select (e.g., monthly or weekly). Each addition increases the balance before subsequent compounding periods, so timing impacts growth. Setting “None” ignores recurring contributions.

No. The calculator does not subtract fees, penalties, or taxes. In taxable accounts, interest may be taxed annually; in tax‑deferred annuities, earnings grow tax‑deferred until withdrawal. Product features and tax treatment vary.

It’s a general compound interest model for education. Fixed annuities and MYGAs often credit interest on a schedule with guaranteed rates and specific rules. Compare today’s MYGA rates or speak with an advisor to map the projection to a specific product.

Different tools assume different timing (start vs. end of period), rounding, or frequency alignment. Small differences in timing and rounding can create noticeable variances over many years.

Use “Copy Shareable Link” to copy a URL with your inputs, or “Export CSV” to download the year‑by‑year schedule for your records or your advisor.