Direct answer
How do you compare two earnings reports consistently?
Compare like-for-like periods and preserve the measurement definitions. Start with revenue, margins, cash flow, segment results, and guidance, then identify restatements, acquisitions, currency effects, and changed non-GAAP adjustments before interpreting the direction.
Set the comparison contract
- Same fiscal period and reporting basis
- Reported and constant-currency results where available
- Continuing operations separated from disposals
- Identical segment and non-GAAP definitions
- Prior guidance compared with delivered results
Read statements together
Income can improve while cash conversion weakens. Compare the income statement, balance sheet, and cash-flow statement as a connected record, then reconcile management commentary with the reported numbers.
Record what changed in the thesis
Do not summarize every line. Identify which saved assumptions were affected, whether evidence strengthened or weakened them, and which questions remain unresolved for the next period.
Limits
- Quarterly seasonality can make sequential comparisons misleading.
- Acquisitions and accounting changes can break comparability.
- Management guidance is uncertain and may use different definitions over time.
Common questions
Questions about this workflow
Should earnings be compared quarter over quarter or year over year?
Use both when relevant. Year-over-year comparisons often control for seasonality, while sequential comparisons can reveal recent inflections. Confirm that the periods and definitions are comparable.
What is the first thing to check in an earnings comparison?
Check the reporting period, accounting basis, segment definitions, and whether acquisitions, disposals, currency, or restatements changed the comparison.