$300 a month invested for 10 years

Run 3 return-rate scenarios to see a realistic range of outcomes — then adjust your monthly amount until it fits your budget.

Open the Money Growth Calculator

Quick setup

Monthly contribution: $300/month
Timeline: 10 years
Return scenarios: 5%, 7%, 10%

Try a step‑up plan

If $300/month feels hard right now, test a smaller starting amount and increase it each year. Even small step-ups can move the result a lot over long horizons.

Make the plan stronger

Automate contributions so you stay consistent.
Keep fees low where possible — fees compound too.
Stay invested through downturns if your timeline is long.

FAQ

Is $300/month enough?

It can be. The biggest drivers are consistency and time. Use the calculator to compare multiple return scenarios.

What return rate should I use?

Try 5% (conservative), 7% (mid), and 10% (optimistic) to see a range.

Does this include inflation, taxes, or fees?

No. Treat results as estimates. You can lower your assumed return rate to be conservative.

What’s better: more time or more money?

If you can’t do both, extra time often helps a lot. Then increase contributions over time.

Where can I learn the formula?

See /how-compound-interest-works.html.

$300 a month invested for 10 years

Quick setup

Try a step‑up plan

Make the plan stronger

FAQ

Related links

Try another calculator