TTM (trailing twelve months)
TTM means trailing twelve months. Learn what it means, how to calculate it and why it matters.
Published Wednesday 5 August 2026
Table of contents
Key takeaways
- TTM (trailing twelve months) is the most recent 12 consecutive months of your business's financial data, measured on a rolling basis rather than by fiscal or calendar year.
- You calculate it by adding your four most recent quarters, or by using the rolling formula that adds the current year-to-date figure and removes the prior-year overlap.
- TTM gives a more current view than annual accounts and smooths out seasonal swings.
- It is also called LTM (last twelve months), and it is commonly used for revenue, EBITDA, and valuation ratios.
What does TTM (trailing twelve months) mean?
TTM, or trailing twelve months, refers to the most recent 12 consecutive months of your business's financial or performance data. Unlike a fixed fiscal or calendar year, TTM gives you a rolling view of how your business has performed up to today.
This timeframe is useful because it captures a full year of activity without waiting for the financial year to end. You may also see TTM called LTM (last twelve months), which means exactly the same thing.
How to calculate TTM
You can calculate TTM figures using one of two methods, depending on how your data is organised.
- Add the figures from your four most recent quarters. This works when you have complete quarterly data available.
- Use the rolling formula: take the latest full financial year figure, add the current year-to-date figure, then subtract the prior year's same year-to-date figure. This avoids double counting any months.
For example, a retail shop with quarterly revenue of HK$300,000, HK$280,000, HK$350,000, and HK$320,000 would have TTM revenue of HK$1,250,000.
Why TTM matters for your business
TTM figures give you a more current picture of performance than waiting for annual accounts to be finalised. They also smooth out seasonal ups and downs by covering a full 12-month cycle, which feeds into more reliable cash flow forecasting.
- Compare your performance over a consistent rolling window rather than waiting for year-end
- Spot trends earlier, so you can act on changes in revenue or costs
- Present a recent track record when applying for finance or a loan
- Use the data to measure profitability and plan ahead
Common metrics reported on a TTM basis
Many financial metrics are expressed on a TTM basis because they give a fuller picture than a single quarter. These are especially useful when analysing business health or comparing profitability ratios.
- Revenue
- EBITDA (earnings before interest, taxes, depreciation and amortisation)
- Earnings per share (EPS)
- Price/earnings (P/E) ratio
TTM vs the financial year and other timeframes
TTM is a rolling 12-month window that updates continuously, while a fiscal or calendar year is a fixed period that only changes once it ends. This makes TTM more responsive to recent activity.
LTM is simply another name for TTM. NTM (next twelve months), on the other hand, looks forward and is based on projections rather than historical data.
Where to find TTM data
For a small business, you pull TTM figures from your own accounting records. Your profit and loss report, also called an income statement, shows revenue and expenses by period. Sum or roll the most recent 12 months of data from your financial statements to arrive at your TTM figures.
Track your business performance with Xero
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FAQs on TTM
Below are answers to common questions about trailing twelve months.
What does TTM mean?
TTM stands for trailing twelve months. It is the past 12 consecutive months of financial data, measured on a rolling basis rather than following a set calendar or fiscal year.
How do you calculate TTM?
Add up the values from your four most recent quarters, or use the rolling formula: latest full-year figure plus current year-to-date minus prior year's same year-to-date amount.
What is the difference between TTM and LTM?
There is no difference. TTM and LTM both refer to the most recent 12 months of data. The terms are interchangeable.
When should I use TTM instead of my annual accounts?
Use TTM when you need a more current snapshot. It is particularly helpful partway through a financial year or when comparing periods that do not align with your fiscal calendar.
Where do I find TTM data for my business?
Your accounting software or management accounts provide the numbers. Run a profit and loss report covering the last 12 months, or sum individual monthly reports to build the figure yourself.
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Disclaimer
This glossary is for small business owners. The definitions are written with their requirements in mind. More detailed definitions can be found in accounting textbooks or from an accounting professional. Xero does not provide accounting, tax, business or legal advice.