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Guide · ~6 min read
Three finance terms that scare first-time founders — a discount rate, WACC, and a DCF valuation. Here's what each one actually does, in plain English, and why the DCF number in an early-stage model lands so far below the comps band that it looks like a mistake. It isn't.
Money later is worth less than money now — because you could invest today's money, and because tomorrow is uncertain. A discount rate is simply the annual percentage you shrink future cash by to state it in today's dollars.
An example makes it concrete. Suppose your model says the business throws off $1,000,000 of cash five years from now.
| Discount rate | $1M five years out is worth… |
|---|---|
| 10% (a stable, low-risk company) | $620,900 |
| 20% (a growth company) | $401,900 |
| 35% (an early, risky startup) | $223,000 |
Same $1M, three very different present values. The higher the discount rate, the more it crushes far-off cash. That single fact is the whole reason an early-stage DCF comes out small — hold that thought.
A company is funded by two kinds of money — equity (from investors) and debt (from lenders) — and each has a cost. Equity investors want a big return for the risk; lenders want interest. WACC — the weighted-average cost of capital — blends those two costs into one number, weighted by how much of each the company uses. That blended number becomes the discount rate you apply to the company's future cash.
For an early startup with no debt and terrified-of-losing-everything equity investors, WACC is essentially the cost of equity — and that is high. A 30–40% WACC is normal for a pre-Series-B company, because the people funding it are pricing in a real chance the whole thing goes to zero. A mature public company might sit at 8–10%. The sample model uses 35% — deliberately high, because the company is early and risky.
A DCF (discounted cash flow) valuation takes all the future cash a company is projected to produce, discounts each year back to today at the WACC, and adds it up. For a mature company that works well. For an early startup, two things break it:
Put those together and the DCF is dominated by a single, wildly assumption-sensitive "terminal value" — a guess about what happens after year five, then discounted hard. In the sample, that produces an enterprise value of about $3.0M.
The other method investors use is comparable multiples: look at what similar growth-stage SaaS companies trade for — roughly 4× to 10× forward ARR — and apply that band to your ARR. On the sample's exit ARR of $28.7M, that band is $115M–$287M.
Neither is "the answer," and the gap is not a bug. It's the known, expected split between a fragile early-stage DCF and a comps band. Investors do not price pre-Series-B rounds on a founder's DCF — they price on comparable multiples and round norms, because everyone in the room knows the DCF is mostly a bet on the terminal-value assumption. The model shows both so you can speak the language: keep the DCF for internal discipline, and let the comps band and your traction set the round.
The move in the room: never lead with "my DCF says we're worth X." Lead with "comparable growth-stage SaaS trades at 4–10× forward ARR; here's my ARR path and my metrics against that band" — and let the investors price it.
ModelKit's valuation tab shows the DCF and the comparable-multiples band side by side, computed from the same integrated build — so you can show method, not assert a number. It's illustrative of methodology, not a valuation opinion.
Request the kit — $149 See the valuation tabEducational material only — not investment, legal, financial, accounting, or tax advice, and not a valuation opinion. Figures are illustrative outputs of a deterministic model; discount-rate and multiple ranges are common rules of thumb, not targets.