On a financial statement, “three months ended” identifies the exact 90-day window the numbers below cover, and the date that follows is the last day of that window. If an income statement is headed “three months ended June 30,” the revenue, expenses, and profit shown were recorded between April 1 and June 30. That is the meaning of “three months ended” in accounting: a timestamp for a single quarter of activity, not a running total from the start of the year.
So when a company reports $80 million in revenue for the three months ended September 30, that $80 million was earned during July, August, and September. The phrase isolates one three-month block so analysts and investors can compare it to the previous quarter or to the same quarter a year earlier. Growth quarter over quarter signals momentum; shrinking margins raise concern. Those patterns disappear inside annual totals, which is why quarterly filings frame their numbers this way.
Which Statements Use “Three Months Ended”
Not every statement in a quarterly report carries this label. The phrase belongs on statements that measure activity across a span of time: the income statement and the cash flow statement. These reports tally what happened during the quarter, including revenue earned, expenses paid, and cash moving in and out.
The balance sheet is different. It captures the company’s financial position at a single moment, so its heading reads “as of” a specific date, such as “as of June 30.” The assets, liabilities, and equity on a balance sheet are a snapshot of what the company owned and owed on that one day, not a running total for the quarter. Keep the distinction in mind when reading a filing: “three months ended” tells you about flow during the quarter, and “as of” tells you where things stood when the quarter closed.
Fiscal Quarters Versus Calendar Quarters
Many companies follow the standard calendar year, so their quarters end on March 31, June 30, September 30, and December 31. But reporting periods do not have to match the calendar. A company can choose a fiscal year that fits its business cycle, which shifts every quarter-end date.
A retailer might set its fiscal year to end January 31 so the full holiday shopping season and post-holiday returns fall inside the same annual report. That retailer’s fiscal quarters would end on April 30, July 31, October 31, and January 31. So “three months ended October 31” on such a filing covers August through October, not the July-through-September window a calendar-year company would report. The specific dates are always printed at the top of each financial statement, so check them before comparing one company’s results to another’s.
Reading the Phrase in Context: Year-to-Date and Prior-Year Columns
A quarterly filing on Form 10-Q shows more than the three months named in the heading. SEC rules require the income statement to display both the current quarter and the cumulative year-to-date period. In a filing for the three months ended September 30, the income statement also includes a column covering the nine months from January 1 through September 30. The cash flow statement shows only the year-to-date period, not the standalone quarter.
Each of these columns is paired with the equivalent period from the prior year. The quarterly income statement shows the same quarter a year ago, and the year-to-date column shows the matching cumulative period. This side-by-side layout lets you see both seasonal patterns and longer-term growth in the same place. If a shipping company always sees a revenue spike in the three months ended December 31, comparing that quarter to the prior year’s fourth quarter tells you whether the spike is stronger or weaker than usual.
Occasionally a company discovers errors in previously reported numbers. When that happens, it may restate the comparative figures so the side-by-side comparison remains meaningful. If the error was small enough that it did not distort the prior-year results on their own, the company can correct the numbers the next time it includes those prior-year statements in a filing rather than amending the original report.
Putting the Phrase to Work
When you open a 10-Q, start by checking the dates at the top of each statement. Confirm whether the company uses a calendar year or a fiscal year, because that changes which real-world months fall inside each quarter. A fiscal quarter ending January 31 captures holiday-season results that a calendar-year company reports in the fourth quarter ending December 31.
Then compare the current quarter to both the same quarter last year and the immediately preceding quarter. The year-over-year comparison reveals growth while filtering out seasonal effects. The sequential comparison shows whether momentum is building or fading. Both perspectives matter, and the columns in the 10-Q are laid out to make the comparisons straightforward.
Finally, check the year-to-date figures against the quarterly ones. A strong quarter can mask a weak first half, and a disappointing quarter might still leave the company ahead of where it was at the same point last year. Reading both timeframes together gives you the most complete picture of where the business stands.
One Boundary Worth Knowing
You will not find a 10-Q for the fourth quarter. Public companies file quarterly reports only for the first three fiscal quarters; the annual report on Form 10-K covers the full fiscal year. Fourth-quarter results can be derived by subtracting the first three quarters’ cumulative totals from the annual figures, but you will not see a stand-alone statement headed “three months ended” for that final quarter.