Investment Return Calculator (USA)
Estimate long-term returns on 401(k), Roth IRA, taxable brokerage, and HSA investments. Calculate compound growth with customizable APY rates, contribution amounts, and time horizons. Perfect for retirement projections and investment planning in the US.
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Frequently Asked Questions
Clear answers to common questions to help you use this calculator confidently.
How does this US investment return calculator work?
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How does this US investment return calculator work?
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It estimates how much your investment may grow from your initial amount, recurring contributions, time horizon, and assumed return rate, showing projections in USD ($) and separating growth from contributions versus returns. The figures are indicative estimates only, not financial or investment advice.
What affects long-term investment growth in the US?
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What affects long-term investment growth in the US?
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Key factors include annual return rate, contribution amount, compounding frequency, account type (401(k), IRA, brokerage), and tax impact.
What return rate should I use for projections?
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What return rate should I use for projections?
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A sensible approach is to model conservative and moderate ranges rather than a single optimistic number. Because markets are volatile, running several scenarios is more realistic than relying on one estimate.
What are the most common mistakes people make when estimating returns?
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What are the most common mistakes people make when estimating returns?
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A common one is assuming high returns every year with no down markets. Another is ignoring fees, inflation, and taxes, which can meaningfully reduce real wealth. The tool works best with realistic assumptions and scenario testing.
Does inflation reduce investment returns?
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Does inflation reduce investment returns?
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Yes. Real (inflation-adjusted) returns provide a more accurate picture of future purchasing power for long-term investors, so it's worth comparing your nominal projection against an inflation-adjusted one.
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How this investment return calculator works
This calculator projects the future value of a lump-sum investment plus optional regular contributions, applying a compound annual growth rate (CAGR). It shows nominal value, inflation-adjusted value and total contributions versus total growth.
- Future value = PV × (1 + r)^n, where r is the annual return and n is the number of years.
- Regular contributions are treated as an ordinary annuity: FV = PMT × [(1 + r)^n − 1] ÷ r.
- Adding the lump-sum and annuity future values gives the total projected portfolio value.
- Inflation adjustment deflates the nominal result by the assumed CPI growth rate.
Investment returns are variable and not guaranteed. Past performance of indices does not predict future results. This is a planning tool only.
Reviewed by Team GlobalCalqulate — Verifies each figure against the issuing authority's published source · Checked
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