A recent short period projected out to a full year — most often the latest month multiplied by twelve. Useful for a fast-growing company, and easy to flatter with one good month, so buyers usually check it against TTM.
Why it matters
Run rate exists to answer a fair question: if the business kept doing exactly what it did last
month, what would a full year of that look like? For a company growing quickly, this can be more
informative than looking backward at TTM, because TTM includes months when the
business was smaller and growing more slowly, and can understate where things stand today.
The same property that makes run rate useful also makes it the most abused number in a valuation
conversation. A single unusually strong month — a large one-off contract, a promotional push, a
seasonal spike — multiplied by twelve produces a headline annual figure that has little to do with
what the business will actually do over the next twelve months. A founder presenting a run rate
without disclosing what drove the underlying month is presenting a number, not a forecast, and an
experienced buyer will treat it as exactly that until proven otherwise.
How it works
The calculation itself is deliberately simple: take a recent short period, most often the latest
month, and multiply it by twelve — or take a recent quarter and multiply by four. The simplicity is
the entire point and the entire risk, because nothing in the calculation checks whether that period
was actually representative of a typical month or quarter.
Because of that, a serious buyer will not accept a run rate on its own. They will ask what made up
that period — how much was new versus recurring, whether any of it was a one-off, and how it
compares to the months immediately before it — and they will weigh it against TTM rather than in
place of it. A run rate that closely tracks a rising TTM trend is a genuinely useful signal of
acceleration. A run rate that is dramatically higher than TTM with no clear explanation is a signal
to look more closely, not a number to build a valuation on.
Questions people ask
- Why is run rate considered the most easily abused number in a valuation?
- Because it takes one short period, often a single month, and multiplies it into an annual figure without checking whether that period was typical. A single unusually strong month driven by a one-off contract or promotion can produce a run rate far higher than the business will actually achieve over the next year, and the calculation itself gives no warning of that.
- How should a founder present a run rate honestly in a valuation conversation?
- By disclosing what made up the period being annualised, including how much was recurring versus one-off, and by showing how the run rate compares to the trailing twelve months rather than presenting it alone. A run rate that tracks a genuine acceleration in the underlying trend is credible; one that is an outlier with no explanation invites scrutiny.
See also
More in Valuation
- Comparable companies — Valuing a company by looking at what similar public companies trade at.
- DCF — Valuing a company by forecasting the cash it will produce and reducing each future year to what it is worth today.
- EBITDA multiple — A valuation expressed as a multiple of annual EBITDA.
- Enterprise value — What the business itself is worth, independent of how it is financed: the value of the operations before counting cash in the bank or debt owed.
- Equity value — What the owners actually receive: enterprise value, plus the cash in the business, minus the debt it owes.
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Updated 2026-09-09