The last twelve months of actual results, whatever the financial year happens to be. Buyers price on TTM rather than on a calendar year because it is the most recent full year of evidence.
Why it matters
Buyers and investors rarely price a company on its most recent calendar or fiscal year, because
that year may have ended months before the deal is discussed. Trailing twelve months solves that by
always looking at the most recent complete year of actual results, whatever today happens to be —
it is the freshest full year of evidence available, and it moves forward every month rather than
resetting once a year.
For a founder, this matters because your own internal reporting may be built around a fiscal year
that does not match what a buyer wants to see. Being able to produce a clean TTM figure on request —
not just an annual report from months ago — is table stakes for a serious conversation about price.
How it works
A TTM figure is calculated by taking the twelve calendar months immediately preceding today,
regardless of where that falls relative to your fiscal year. In practice this usually means adding
the current partial fiscal year to date and then adding the remaining months from the prior full
fiscal year, so the twelve months are continuous and current.
TTM is prized specifically because it is built entirely from results that already happened — no
projection, no assumption about what the rest of the year will do. That is also its limit: it says
nothing about what happens next, which is why a fast-growing company's TTM figure can understate
where the business actually is today, and why buyers will look at TTM alongside a run rate
rather than choosing one over the other.
Keeping a TTM figure ready at all times, rather than reconstructing it under pressure once a buyer
asks, is a small piece of preparation that pays off disproportionately. It signals that your
reporting is current and trustworthy, and it removes a step where a rushed calculation could
introduce an error that a buyer's advisors then have to query, costing time and a little credibility
at exactly the wrong moment in a negotiation.
Questions people ask
- Why do buyers price a deal on TTM instead of the last fiscal year?
- Because the last completed fiscal year may already be stale by the time a deal is being discussed, sometimes by many months. Trailing twelve months always reflects the most recent full year of actual results as of today, which gives a buyer the freshest complete picture available rather than a report that is already out of date.
- How is TTM different from a run rate?
- TTM is built entirely from results that have already happened over the last twelve months, with no projection involved. A run rate takes a much shorter recent period and multiplies it forward to estimate a full year, which means it is forward-looking and far more sensitive to one unusually strong or weak period.
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