# Discount Rate: Why Future Cash Flows Are Worth Less Today

Understand discount rates, present value, WACC, cost of equity, risk premiums, and why higher required returns usually reduce the value of distant growth cash flows.

Canonical: https://wiki.fcontext.com/stocks/discount-rate/
Fact checked: 2026-07-14

> For educational purposes only; not investment advice.

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## Direct answer

A **discount rate** is the required return used to convert future cash flows into today's value.

The basic idea is:

`present value = future cash flow ÷ (1 + discount rate)^t`

A higher discount rate lowers the present value of the same future cash flow. The effect is strongest for cash flows far in the future, which is why long-duration growth stocks are often more sensitive to changes in rates and risk premiums.

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## How it works

The discount rate must match the cash flow being valued. Enterprise free cash flow is commonly discounted with WACC, because it belongs to both debt and equity capital providers. Equity cash flow should be discounted with a cost of equity.

The cost of equity is often described as a risk-free rate plus compensation for market and company-specific risk. WACC adds after-tax debt cost and capital-structure weights.

Consistency matters. Dollar cash flows should use a dollar-based discount rate. Nominal cash flows should use nominal rates; inflation-adjusted cash flows should use real rates.

Terminal value can dominate a DCF model. Small changes in the discount rate or long-term growth assumption can move valuation sharply, so a range of scenarios is more honest than one precise point estimate.

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## Example

Receiving $100 in ten years is worth about $55.84 today at a 6% discount rate:

`$100 ÷ 1.06^10 ≈ $55.84`

At a 10% discount rate, the same $100 is worth about $38.55:

`$100 ÷ 1.10^10 ≈ $38.55`

The present value falls about 31%. If the $100 arrived next year instead, the drop from 6% to 10% would be much smaller. Timing is a major reason discount-rate changes affect distant-growth stories more.

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## Risks

- **Mismatch risk:** Using WACC for equity cash flow, or cost of equity for enterprise cash flow, mixes claims.
- **False precision:** A DCF can look exact while depending heavily on uncertain inputs.
- **Terminal-value risk:** Small changes in long-term growth or discount rate can dominate the answer.
- **Currency and inflation risk:** Mixing real, nominal, or different-currency inputs can distort value.
- **Double-counting risk:** The same business risk should not be fully penalized in both cash-flow scenarios and the discount rate without intent.

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## Common misconceptions

The discount rate is not just the central bank policy rate. It includes time, opportunity cost, financing conditions, and risk compensation.

A lower discount rate does not automatically make a stock attractive. The market price and cash-flow forecast may already assume that lower required return.

The company's loan rate is usually not the right rate for equity valuation because shareholders bear residual risk after creditors.

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## Related topics

- [Free Cash Flow](/stocks/free-cash-flow/)
- [Cost of Equity](/stocks/cost-of-equity/)
- [Capital Asset Pricing Model](/stocks/capm/)

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## Sources

- SEC: financial-statement context for cash-flow analysis.
- Federal Reserve: interest-rate data used as market reference inputs.
- Journal of Finance: foundational capital-asset-pricing research.