10-K vs. 10-Q: Key Differences Explained
10-K and 10-Q are both required SEC filings for US public companies, but they serve different purposes, cover different time periods, and differ significantly in the depth and auditing of the financia...
10-K vs. 10-Q: Key Differences Explained
10-K and 10-Q are both required SEC filings for US public companies, but they serve different purposes, cover different time periods, and differ significantly in the depth and auditing of the financial information they contain. Knowing which to use — and when — affects the quality of your company research.
What Is a 10-K?
A 10-K is a company's annual report filed with the SEC. It covers the full fiscal year and must be filed within 60 days of fiscal year end for large accelerated filers (companies with a public float over $700M), 75 days for accelerated filers, and 90 days for smaller reporting companies.
The 10-K contains the company's complete audited financial statements — income statement, balance sheet, and cash flow statement — along with extensive notes. The financial statements are audited by an independent CPA firm, meaning a third party has reviewed and confirmed that the statements conform to GAAP.
What Is a 10-Q?
A 10-Q is a quarterly update filed for Q1, Q2, and Q3 of the fiscal year. (Q4 financials are covered by the annual 10-K, so there is no Q4 10-Q.) The filing deadline is 40 days after quarter end for large accelerated and accelerated filers, 45 days for smaller reporting companies.
The 10-Q contains unaudited financial statements. The same line items are present — income statement, balance sheet, cash flow statement — but they have been reviewed (not audited) by the company's external auditor. "Review" is a lower standard than "audit": the auditor checks for obvious errors and material inconsistencies but does not conduct the extensive verification procedures required for a full audit opinion.
Side-by-Side Comparison
| Feature | 10-K | 10-Q |
|---|---|---|
| Period covered | Full fiscal year | One fiscal quarter (Q1, Q2, or Q3) |
| Audited? | Yes — full audit opinion | No — reviewed, not audited |
| Filing frequency | Once per year | Three times per year |
| Filing deadline (large filers) | 60 days after fiscal year end | 40 days after quarter end |
| Business description | Full — products, markets, strategy | Abbreviated update only |
| Risk factors | Full list, updated annually | Material changes only |
| MD&A (Management Discussion) | Comprehensive, full year | Focused on quarter-to-quarter and YTD changes |
| Legal proceedings | Full disclosure | Updates since last filing |
| Length (typical large company) | 100–300+ pages | 50–100 pages |
Which Filing Should You Start With?
For most company research, start with the most recent 10-K. It gives you the complete picture: audited financials, full business description, competitive landscape, and the company's own assessment of its risks. The 10-K is the foundation.
Then read the 10-Qs that were filed after the most recent 10-K to get current-quarter updates. A company's 10-K might be eight months old by the time you read it — the subsequent 10-Qs contain material developments (revenue changes, new debt, litigation updates, executive departures) that can significantly change the picture.
Key Differences in the Financial Statements
Audited vs. Reviewed
This is the most important practical difference. An audited 10-K income statement has been verified through procedures including document inspection, third-party confirmations, and recalculation. A reviewed 10-Q has been subject to analytical procedures and inquiry — the auditor looked for anomalies but did not verify underlying transactions. In practice, most large companies have strong internal controls and 10-Q data is reliable, but the distinction matters if you are doing credit analysis or evaluating a company with a history of accounting issues.
Comparative periods shown
A 10-K income statement shows the current year, prior year, and two years prior (three years total for most companies). A 10-Q income statement shows the current quarter, the same quarter of the prior year, the year-to-date period, and the prior year YTD. This makes quarterly trend analysis easier in 10-Qs, while multi-year trend analysis requires the 10-K.
Notes to financial statements
10-K notes are comprehensive. They disclose revenue recognition policies, segment details, debt terms, pension obligations, stock compensation plans, and much more. 10-Q notes are abbreviated — they update 10-K disclosures for new events but do not repeat the full disclosure. Always read the 10-K notes before the 10-Q to have the proper context for quarterly updates.
Where to Find 10-K and 10-Q Filings
All SEC filings are freely available on EDGAR (sec.gov/edgar). Search by company name or CIK number, then filter by form type — "10-K" for annual reports, "10-Q" for quarterly reports. Most investor relations pages also link directly to recent filings. Tools like Stock Analysis, Macrotrends, and TIKR extract the financial statement data from these filings into formatted tables, which speeds up the research process significantly.
What About 8-K Filings?
The 10-K and 10-Q cover scheduled reporting periods. 8-K filings cover material events that happen between scheduled reports — earnings announcements, major acquisitions, CEO departures, regulatory actions. For current-event monitoring, setting up EDGAR email alerts for a company's 8-K filings keeps you informed between quarterly and annual reports.
Summary
The 10-K is the annual, audited, comprehensive filing — use it as your foundation for any company analysis. The 10-Q is the quarterly, reviewed update — use it to stay current between annual filings. Start with the 10-K, then layer in the most recent 10-Qs for current-quarter developments. All filings are free on SEC EDGAR.
Disclaimer: Financial figures cited in this article are approximate and sourced from publicly available reports. Always verify against the company's current SEC filings (10-K, 10-Q) or earnings releases before using in investment or business analysis.