What it means
Annual reports only come once a year, so by the time they are published they may be months out of date, and TTM updates the annual span to the latest available month or quarter. If it is the end of September, TTM revenue covers October last year to September this year, and every month the oldest month drops off and the newest is added.
State the ending date and whether the figures are audited, interim or management estimates. A full twelve-month span includes each season once, which makes it easier to compare than a single busy or quiet quarter, though it does not remove the effects of changing seasonality, acquisitions or unusual events.
Investors use TTM figures to value companies, since valuation ratios such as price to earnings or enterprise value to EBITDA are often based on TTM earnings, the freshest full-year numbers available. Lenders and buyers also rely on TTM, and a bank or buyer may request TTM revenue or earnings alongside audited accounts and forecasts, although the chosen metric and lending decision depend on its own process.
TTM can be calculated from quarterly or monthly data. One quick method is to take the last full financial year, add the latest year-to-date figures, then subtract the same year-to-date period from the prior year.
Keep definitions consistent across the periods added and subtracted, because if an acquisition or accounting policy changed, an apparently simple TTM growth rate may compare different businesses. Label adjustments and show an unadjusted figure as well, so readers can see what was removed and why.
For a point-in-time measure such as cash balance or debt, adding twelve monthly balances is usually wrong, since TTM applies naturally to flows over time, such as revenue or operating expenses. An average balance is a separate calculation with its own purpose.
In practice
Real-world examples.
Example
In August, a cafe's owner calculates TTM revenue of $920,000 by adding up sales from September last year to August this year.
Example
A buyer values a business at 5 times TTM EBITDA of $1.2 million, giving an enterprise value of $6 million.
Example
A seasonal tour operator's January to June figures look weak, but its TTM revenue of $3.4 million is up 12%, showing the business is growing overall.
Formula
Calculation
TTM = last full financial year + current year-to-date - prior-year year-to-date for the same period.
Worked example: a company's financial year ends 31 December and it is now 30 June. Full-year revenue last year was $10,000,000, revenue from January to June this year was $5,600,000, and revenue from January to June last year was $4,800,000. TTM revenue is $10,000,000 + $5,600,000 - $4,800,000 = $10,800,000, which shows the business's most recent annual revenue is 8% higher than its last reported full year, since $800,000 / $10,000,000 = 8%.
The same figure can be built from four quarters. If the last four quarters were $2,500,000, $2,700,000, $2,800,000 and $2,800,000, their sum is $10,800,000, which matches the first method and confirms the arithmetic.Case study
Seen in the real world.
This illustrative and entirely fictional example follows Crescent Clinics, an invented healthcare group reviewing its loan options. Last year's audited EBITDA was $1.8 million. Management's latest twelve-month figure is $2.6 million after two new sites opened, an increase of $0.8 million, or about 44%. The lender requests the underlying monthly results and checks one-off setup costs, working capital and cash flow.
It does not automatically approve a larger facility because one TTM number rose. The clinics still need to show that they can service the proposed debt under plausible lower-demand scenarios. Crescent labels its TTM figure as unaudited management information and reconciles it with the last audited year plus comparable year-to-date periods. It also presents the earlier twelve months on the same basis.
The bank can then see both growth and the change in site mix. The group later finds an acquisition included for only part of the comparative span. Its analyst adds a note explaining the discontinuity instead of describing the entire difference as organic growth. The rolling figure remains useful, but its limits are visible.
Watch out
Common mistakes.
- Using an old annual figure when a TTM figure is available. It can seriously misstate current performance.
- Adding months incorrectly. TTM must be exactly twelve consecutive months, with no gaps or overlaps.
- Ignoring one-off items. A single large deal in the trailing period can inflate TTM figures that will not repeat.
Questions
People also ask.
Is TTM the same as LTM?
Yes. LTM (last twelve months) and TTM are two names for the same rolling twelve-month measure, so state the ending date either way.
How is TTM different from a financial year?
TTM moves forward as new monthly or quarterly results become available. A financial year covers a fixed reporting period, which may end months before the latest data.
Is TTM a forecast?
No. It is a historical result for the latest twelve months, not a promise of the next twelve. A forecast needs explicit assumptions about future activity.
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