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TTM (Trailing Twelve Months) Calculator

Publicly traded companies report earnings quarterly, but investors often need full-year comparisons before the annual report arrives. Trailing twelve months (TTM) solves this by summing the last four quarters of any metric—revenue, earnings per share, EBITDA, or dividend yield. Analysts and traders use TTM to assess real-time profitability and valuation without waiting for year-end filings.

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Creators Małgorzata Koperska, MD
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Understanding Trailing Twelve Months in Stock Analysis

Trailing twelve months represents a company's financial performance over the most recent four consecutive quarters. Unlike fiscal-year reporting (which occurs once annually), TTM data updates every quarter, allowing investors to make informed decisions at any point in the year.

The method is especially valuable between earnings releases. If it's August and the latest quarterly filing shows strong growth, you can calculate TTM metrics immediately rather than projecting forward to the year-end report. This reduces uncertainty and helps identify inflection points in a company's trajectory.

TTM works for any cumulative metric:

  • Revenue TTM – total sales over twelve months
  • EPS TTM – earnings per share accumulated over the period
  • EBITDA TTM – operational cash generation before interest, taxes, depreciation, and amortization
  • Dividend yield TTM – annualized dividend payout based on recent distributions

Because each quarter is distinct, TTM automatically excludes outdated data as fresh quarters arrive, keeping the metric current without manual adjustment.

TTM Calculation Formulas

Each TTM metric follows the same principle: add the four most recent quarterly values. Ensure you use consecutive quarters without gaps for accuracy.

TTM = Q₁ + Q₂ + Q₃ + Q₄

Revenue TTM = Rev₁ + Rev₂ + Rev₃ + Rev₄

EPS TTM = EPS₁ + EPS₂ + EPS₃ + EPS₄

P/E TTM = Current Stock Price ÷ EPS TTM

EV/EBITDA TTM = Enterprise Value ÷ EBITDA TTM

Yield TTM = (Total Dividends over 4 Quarters ÷ Shares Outstanding) ÷ Current Price

  • Q₁, Q₂, Q₃, Q₄ — The four most recent consecutive quarterly values for the metric you're calculating
  • Revenue TTM — Sum of quarterly revenues; reflects total top-line sales for the twelve-month period
  • EPS TTM — Sum of quarterly earnings per share; used to calculate valuation multiples
  • EBITDA TTM — Sum of quarterly EBITDA figures; measures operational profitability before capital structure effects
  • Current Stock Price — The most recent market price of the stock
  • Enterprise Value — Market capitalization plus debt minus cash; represents the theoretical acquisition cost

Common TTM Metrics and Their Uses

Investors and analysts track several key TTM metrics to evaluate a company's health and value:

TTM Revenue shows the company's total sales run rate. Growing revenue suggests increasing market share or pricing power. Declining revenue may signal competitive pressure or economic headwinds.

TTM Earnings Per Share (EPS) aggregates net income available to shareholders. A rising EPS trend (even mid-year) can signal improving profitability before the annual report confirms it. This metric feeds directly into valuation ratios.

P/E Ratio (TTM) divides the stock price by TTM EPS, revealing how much investors pay per dollar of recent earnings. A P/E of 15 is considered moderate in most sectors; anything above 25 suggests either growth expectations or overvaluation, depending on the industry and earnings trajectory.

EV/EBITDA TTM compares enterprise value to operational cash generation. Technology companies typically trade at 20–30× EBITDA, while utilities trade at 10–15×. A multiple significantly above the sector median warrants scrutiny.

Dividend Yield (TTM) annualizes recent dividend payments. A 3–4% yield on a blue-chip stock is attractive; 8%+ may signal distress or mean-reversion opportunity.

TTM vs. Forward-Looking Valuation

TTM metrics are backward-looking; they reflect performance that has already occurred. Forward multiples—such as next-year P/E or next-fiscal-year EV/EBITDA—instead assume future growth.

Comparing the two reveals market sentiment. If a company's TTM P/E is 25 but its forward P/E (based on expected earnings) is 15, investors anticipate significant earnings growth. Conversely, if TTM P/E is lower than forward P/E, the market expects earnings to decline or growth to stall.

For mature, slow-growth companies, TTM and forward multiples converge, offering stability. For high-growth firms (tech, biotech, renewable energy), the gap widens. A company growing earnings at 50% annually will see its TTM P/E compression—the valuation appears cheaper—as those higher future earnings are incorporated into the trailing figure over time.

Savvy investors use TTM to catch transitions: when a struggling company stabilizes, TTM metrics improve before forward estimates update, creating a buying window. Conversely, when a high-growth company begins to decelerate, forward multiples contract before TTM catches up, signaling an exit.

Key Pitfalls and Best Practices

Avoid common mistakes when interpreting or calculating TTM metrics.

  1. Ensure Quarters Are Consecutive — Gaps in quarterly data distort TTM. If a company reports Q1, Q2, Q3, and then skips to Q1 of the next year, you're mixing fiscal periods. Always verify that your four quarters are sequential to the most recent report date.
  2. Don't Ignore One-Time Items — Quarterly earnings sometimes include one-time gains (asset sales) or losses (restructuring). A spike in EPS TTM due to a one-time event doesn't reflect ongoing profitability. Check the income statement for non-recurring items before making valuation judgments.
  3. Account for Seasonality — Many industries have strong and weak quarters. A retailer's Q4 dominates annual sales; a tax preparer's Q1 is crucial. TTM smooths seasonality by design, but comparing Q2 TTM to Q4 TTM for a seasonal business can still be misleading if earnings patterns shift.
  4. Sector Benchmarking Is Essential — A P/E of 30 is expensive for a utility but cheap for a software company. Always compare TTM multiples to the sector median and to historical averages for the specific stock. Outliers warrant investigation, not automatic buy or sell decisions.

Frequently Asked Questions

What does TTM stand for and why is it important?

TTM stands for trailing twelve months. It refers to the sum of the most recent four consecutive quarterly financial results. This metric matters because it provides a full-year perspective at any point in the calendar, without waiting for the annual report. Investors use TTM to monitor earnings growth, revenue trends, and valuation multiples in real time, enabling faster decisions on positions and identifying inflection points before the broader market reacts.

How do I calculate the P/E ratio using TTM?

First, gather the earnings per share (EPS) from the last four quarterly earnings reports. Sum these four EPS figures to obtain EPS TTM. Next, find the current stock price from your broker or financial website. Divide the stock price by EPS TTM to yield the TTM P/E ratio. For example, if EPS TTM is $4.50 and the stock trades at $90, the P/E TTM is 20. This ratio is especially useful for mid-year comparisons before the annual report is published.

What indicates an overvalued or undervalued EV/EBITDA multiple?

Whether an EV/EBITDA multiple is expensive or cheap depends entirely on the industry. Utility companies typically trade at 10–14× EBITDA because their earnings are stable and predictable. Technology and software firms often command 20–35× multiples due to expected growth. If a company's EV/EBITDA is significantly above its sector median—say 50× when peers average 25×—it may be overvalued unless the company has exceptional growth or margins. Conversely, a multiple well below the median can signal undervaluation or hidden risks. Always compare against comparable companies, not in isolation.

How does TTM help with stock valuation during high growth?

Companies with rapid earnings growth see their TTM multiples compress naturally over time. If a firm grows earnings 50% annually and currently trades at a P/E of 40, that P/E will fall to 26 the following year and 17 the year after—without the stock price rising—simply because earnings in the TTM pool have grown. This allows investors to project whether a high valuation today will normalize, justifying a buy. Conversely, if growth slows, TTM multiples may expand, signaling deterioration before forward estimates catch up.

Can I use TTM to compare companies in different fiscal years?

Yes, that is one of TTM's key strengths. Unlike comparing fiscal-year results (which occur on different calendar dates), TTM always represents the last twelve calendar months of data, regardless of each company's fiscal year-end. This allows apples-to-apples valuation comparisons between a company with a December year-end and one with a June year-end. Both can be assessed on the same date using TTM metrics.

What are one-time items and why do they matter for TTM analysis?

One-time items are non-recurring gains or losses, such as profits from selling a subsidiary, restructuring charges, or litigation settlements. These inflate or deflate earnings in a single quarter but don't reflect ongoing business performance. Because TTM sums four quarters, a large one-time gain can skew EPS TTM upward, making the P/E look deceptively cheap. Always review the earnings call transcript or financial statements to identify one-time items and assess whether the underlying operational earnings are improving or declining.

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