Earnings Surprises Explained: EPS and Revenue vs Consensus, Surprise % and Guidance

The short version

When a public company reports quarterly results, the headline numbers are usually earnings per share (EPS) and revenue. Before the report, analysts who cover the company publish estimates, and data providers average them into a consensus. An earnings surprise is the gap between what the company reported and that consensus, often expressed as a percentage.

The arithmetic is simple. The traps are in the inputs: which consensus, which EPS (GAAP or adjusted), and whether the estimate was negative. Results also arrive with guidance, the company's own outlook, which is a separate comparison against what analysts expected for future periods.

How a surprise is calculated

The standard formula:

Surprise % = (actual − consensus) ÷ |consensus| × 100

The absolute value in the denominator keeps the sign meaningful when the estimate is negative.

A worked example

Hypothetical Company X reports its third quarter.

Hypothetical figures.

Negative and near-zero estimates

Percentages break down near zero. If the consensus is a loss of $0.02 per share and the company reports a loss of $0.01, the surprise is (−$0.01 − (−$0.02)) ÷ $0.02 = +50%, a one-cent difference. If the consensus is $0.00, the percentage is undefined. For loss-making and early-stage companies, the dollar difference is often more informative than the percentage.

Which consensus, and which EPS

Consensus is a provider's number

There is no official consensus. Each data provider collects estimates from the analysts it tracks, decides which are current, and averages them (or uses a median). Two providers can therefore show different consensus figures, and a company covered by two analysts has a much less stable consensus than one covered by thirty.

GAAP versus adjusted EPS

Companies report EPS under generally accepted accounting principles (GAAP). Many also report an adjusted or non-GAAP figure that excludes items such as stock-based compensation, amortization of acquired intangibles, restructuring charges or one-time gains. Analysts often estimate the adjusted figure.

• A surprise is only meaningful when actual and consensus are on the same basis.
• SEC Regulation G and Item 10(e) of Regulation S-K require companies presenting non-GAAP measures to show the most directly comparable GAAP measure and reconcile the two.
• The reconciliation table in the earnings release shows exactly what was excluded.

Share count

EPS divides earnings by the weighted average share count, and diluted EPS adds shares from options, warrants and convertibles that would be dilutive. A company that issued a large number of shares during the quarter can report higher net income and lower EPS at the same time.

Guidance

Guidance is management's forecast for a future quarter or year, often a range for revenue and EPS. When a company updates guidance, the market compares the new range to the consensus for that future period, so a quarter can beat expectations while lowered guidance sits below the consensus for the next one.

Guidance is a forward-looking statement. Companies accompany it with cautionary language under the safe harbor of the Private Securities Litigation Reform Act, and some companies do not give guidance at all. A company withdrawing guidance is itself information about how much visibility management says it has.

Where results are filed

Earnings reach the public through several documents, in a typical order:

1. The press release, often before the open or after the close. Companies commonly time releases outside regular hours.
2. An 8-K under Item 2.02, "Results of Operations and Financial Condition," which furnishes the press release as an exhibit (usually Exhibit 99.1). Information furnished under Item 2.02 is not deemed "filed" for liability purposes unless the company says otherwise.
3. The conference call and slides, where guidance is often discussed in more detail. Slides may be furnished under Item 7.01 (Regulation FD disclosure).
4. The 10-Q or 10-K, the full financial statements with notes. A 10-Q is due 40 days after quarter end for large accelerated and accelerated filers and 45 days for other filers. The press release usually comes first, sometimes weeks earlier.

Numbers in the press release can be revised before the 10-Q is filed, so the 10-Q is the authoritative version.

How to check earnings on Signal8

• The market calendar shows upcoming events, including earnings dates.
• The live SEC filings feed shows 8-K Item 2.02 releases and 10-Qs as they arrive.
• A company's financials tab shows reported figures across periods.

Earnings releases often land in the premarket session; see Premarket Trading and Relative Volume for how early volume around them is measured.

FAQ

How is an earnings surprise percentage calculated?

Subtract the consensus estimate from the reported figure, divide by the absolute value of the consensus, and multiply by 100. If consensus EPS was $0.50 and the company reported $0.56, the surprise is ($0.56 − $0.50) ÷ $0.50 = 12%. The same formula applies to revenue. Percentages become unstable when the estimate is close to zero, so the dollar difference is often shown too.

Why do different sites show different consensus estimates?

There is no official consensus. Each data provider gathers estimates from the analysts it tracks, decides which ones are current, and averages them in its own way. Providers may also estimate different measures, such as GAAP EPS or an adjusted figure. For companies with few covering analysts, a single revised estimate can move the consensus noticeably.

What is the difference between GAAP and adjusted EPS?

GAAP EPS follows US accounting rules. Adjusted, or non-GAAP, EPS removes items management considers unrepresentative, such as stock-based compensation, amortization or one-time charges. Regulation G requires companies to reconcile non-GAAP measures to the closest GAAP measure. A surprise is only meaningful when the reported figure and the consensus are calculated on the same basis.

Where does a company file its earnings with the SEC?

The earnings press release is usually furnished on Form 8-K under Item 2.02, with the release attached as Exhibit 99.1. The full quarterly financial statements follow in the Form 10-Q (or 10-K for the fourth quarter and full year), due 40 or 45 days after quarter end depending on filer status. The 10-Q is the authoritative version of the numbers.