Calculate your investment potential with the Gemini 4 Investment Calculator. Easy, fast, and accurate investment insights.
Formula
const initial = inputs.initialInvestment; const contribution = inputs.annualContribution; const years = inputs.investmentHorizon; const rate = inputs.expectedReturnRate / 100; const tax = inputs.taxRate / 100; const frequencyMap = { 'Annually': 1, 'Quarterly': 4, 'Monthly': 12 }; const frequency = frequencyMap[inputs.compoundingFrequency]; let futureValue = initial; for (let i = 0; i < years; i++) { futureValue = futureValue * (1 + (rate / frequency)) ** frequency + contribution; } const totalGains = futureValue - initial - (contribution * years); const taxableGains = Math.max(0, totalGains); const taxOwed = taxableGains * tax; futureValue = futureValue - taxOwed; return { futureValue: futureValue, totalGains: totalGains };Initial Investment
10,000
Annual Contribution
1,000
Investment Horizon (Years)
10
Expected Annual Return Rate (%)
7
Compounding Frequency
Annually
Estimated Tax Rate on Gains (%)
20
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Gemini 4 Investment Calculator projects Projected Future Value, Total Investment Gains using Initial Investment, Annual Contribution, Investment Horizon (Years), Expected Annual Return Rate (%). Investment returns are never guaranteed — historical averages don't predict future results, and fees, taxes, and inflation reduce real returns. Use this as a planning tool, not a promise of outcome, and consider professional advice for large decisions.
Use this finance calculator to compare scenarios before committing money, time, or a provider conversation.
The estimate combines Initial Investment, Annual Contribution, Investment Horizon (Years) and returns Projected Future Value, Total Investment Gains.
If the result changes your decision, verify the current quote, rate, eligibility rule, or provider term before acting.
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This calculator provides estimates based on the inputs provided. It does not constitute financial advice, investment recommendations, or tax guidance. Past performance does not guarantee future results. Consult a qualified financial advisor, accountant, or tax professional before making financial decisions.
Reviewed by the CalculateThis.ai editorial team. Updates: check back for latest parameters. Tools are for estimation only — verify with current provider terms.