Time Value of Money Calculator
Calculate present and future values of money using discount rates and compounding. Understand how inflation and interest affect the real value of cash flows.
Last updated: April 2026
The time value of money (TVM) is the concept that a dollar today is worth more than a dollar in the future because of its potential earning capacity. Future Value = Present Value × (1 + rate)^periods. Startup Discount Rate typically target 15-25%. Embed on your website to capture qualified leads.
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What is Time Value of Money?
The time value of money (TVM) is the concept that a dollar today is worth more than a dollar in the future because of its potential earning capacity. This foundational financial principle drives investment decisions, project evaluations, and business valuations. Every business decision with costs or benefits spread over time should account for TVM.
The Formula
Future Value = Present Value × (1 + rate)^periods Present Value = Future Value ÷ (1 + rate)^periods Discount Rate = Required Rate of Return or Cost of Capital
For business decisions, use your weighted average cost of capital (WACC) as the discount rate. For personal finance, use expected investment return.
Worked Example
A startup can invest $100,000 today in a marketing campaign expected to generate $150,000 in revenue over 3 years. The company's cost of capital is 12%.
- Expected return = $150,000 over 3 years
- Year 1: $40,000 ÷ 1.12 = $35,714
- Year 2: $50,000 ÷ 1.12² = $39,860
- Year 3: $60,000 ÷ 1.12³ = $42,707
- NPV = $35,714 + $39,860 + $42,707 − $100,000 = $18,281
📌 The project has a positive NPV of $18,281, meaning it generates returns above the 12% cost of capital. The $150K in nominal future revenue is worth $118,281 in today's dollars.
Why This Matters
Investment decisions
TVM helps you compare investments with different timeframes. A project returning $200K in 1 year is worth more than one returning $250K in 5 years (at reasonable discount rates).
Contract negotiation
Receiving $120K upfront is better than $130K over 12 months at any discount rate above 8.3%. TVM quantifies the value of early payment.
Business valuation
All DCF (discounted cash flow) valuations rely on TVM. Future cash flows are discounted to present value to determine what a business is worth today.
Common Mistakes
❌ Ignoring inflation
A nominal 10% return with 3% inflation is only a 7% real return. Use real (inflation-adjusted) rates for long-term projections to avoid overestimating actual purchasing power.
❌ Using the wrong discount rate
Too low a discount rate overvalues future cash flows; too high undervalues them. Use WACC for business projects, risk-free rate + risk premium for investments.
❌ Not discounting at all
Comparing $100K today to $120K in 3 years without discounting ignores opportunity cost. At 8% return, $100K today grows to $125,971 in 3 years — making it the better option.
Industry Benchmarks
| Category | Good | Average | Poor |
|---|---|---|---|
| Startup Discount Rate | 15-25% | 25-40% | Above 50% |
| Corporate WACC | 8-12% | 12-18% | Above 20% |
| Risk-Free Rate (US) | 4-5% | Current T-bill rate | N/A |
Source: Investopedia Financial Analysis
Benchmark data sourced from Investopedia Financial Analysis.
From analyzing thousands of financial calculator interactions, the businesses that embed these on their pricing or services page see the highest conversion — visitors who calculate their own numbers trust the result more than any sales pitch.
One of the most common mistakes we see when working with clients: ignoring inflation. A nominal 10% return with 3% inflation is only a 7% real return. Use real (inflation-adjusted) rates for long-term projections to avoid overestimating actual purchasing power.
Embed This Calculator on Your Website
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