A discounted cash flow model projects future cash flows and discounts them to a present value, so you supply the assumptions and it returns a price. A reverse DCF runs the same machinery backwards: you supply the current price and it returns the growth rate the market must already be assuming.
The same equation, solved for a different unknown
There is one model here, not two. It relates cash flows, a growth rate, a discount rate and a price. A standard DCF holds the growth and discount rates fixed and solves for price. A reverse DCF holds the price and discount rate fixed and solves for growth.
That is a small mathematical difference and a large practical one, because it changes what you are being asked to be right about.
What each one asks of you
DCF: "I think this grows 12% for ten years,
then 3%, discounted at 9%."
→ returns "worth \$84 a share"
Reverse: "It trades at \$96. At a 9% discount rate,
what growth does that require?"
→ returns "14% a year for a decade"
The first hands you a number that looks precise and inherits every error in your forecast. The second hands you a claim you can check against the company's actual record.
Why the reverse version is easier to use honestly
Forecasting a decade of cash flows is something almost nobody does well, and a DCF's output is exquisitely sensitive to those forecasts. Shift growth by two points and the discount rate by one and a $84 valuation becomes $60 or $120. The decimal place implies a confidence the inputs cannot support.
A reverse DCF sidesteps the problem by never asking you to forecast. Judging whether a company can compound at 14% for a decade is a far more tractable question than predicting what it will earn in year seven, and it is answerable from evidence: what has it actually done, how large is the market, how durable is the moat.
When the standard DCF is still the right tool
- Stable, predictable businesses in capital return, where the forecast is genuinely constrained by history and the model earns its keep.
- Comparing scenarios. A DCF is good at showing how much value hangs on one assumption, which is useful even when the absolute output is not.
- When there is no market price. Private companies and acquisitions leave you nothing to reverse-engineer, so you have to forecast.
The practical habit
Run the reverse DCF first. If the implied growth is obviously achievable or obviously impossible, you are finished and you never needed a valuation. Only when it lands in the ambiguous middle is a full DCF worth building, and by then you know exactly which assumption the answer turns on.
Neither model says anything about business quality. A reasonable implied growth rate for a company with a collapsing moat is not a buy signal, which is why valuation sits last in a sensible sequence rather than first.
Both models need inputs that only exist in some phases
Neither a DCF nor a reverse DCF works on a company with no stable cash flows, which rules out most of the first two lifecycle phases. Phase Check tells you where a company sits before you build anything.
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Frequently asked questions
Related
- Reverse DCF, the full guide, including where it breaks
- Intrinsic value, what both models are estimating
- WACC, where the discount rate comes from
- The 5 lifecycle phases, which valuation method fits which phase