10-K vs 10-Q: What's the Difference?
Updated April 5, 2026
Both filings come from the SEC and follow a similar structure. The differences come down to frequency, depth, and whether the numbers have been verified.
Frequency
Companies file one 10-K per year and three 10-Qs. The 10-Qs cover the first three fiscal quarters. There’s no 10-Q for the fourth quarter because the 10-K covers the full year, including Q4.
For a company with a December fiscal year end, the filing schedule looks like this: 10-Q in May (Q1), 10-Q in August (Q2), 10-Q in November (Q3), and 10-K in February or March (full year).
Audited vs unaudited
The 10-K contains audited financial statements. An independent accounting firm reviews the books, tests the numbers, and signs off that they fairly represent the company’s financial position. This matters because auditors sometimes catch errors or push back on aggressive accounting.
The 10-Q financials are unaudited. The company prepares them internally with no outside verification. They’re still subject to SEC rules and management certifies their accuracy, but there’s less scrutiny.
Level of detail
The 10-K is comprehensive. It includes a full business description, complete risk factors, five years of financial data, and detailed notes on accounting policies. Reading a company’s 10-K gives you the complete picture of how the business works.
The 10-Q is incremental. It reports quarterly financials and management’s analysis of that quarter’s results, but it doesn’t repeat the full business description. The risk factors section only covers material changes since the last 10-K. If nothing significant changed, that section might be a single paragraph.
Filing deadlines
Large companies file 10-Ks within 60 days of their fiscal year end and 10-Qs within 40 days of quarter end. Smaller companies get more time: up to 90 days for 10-Ks and 45 days for 10-Qs.
When to read each one
Read the 10-K when you’re researching a company for the first time, whether for investment, competitive analysis, or professional reasons. It’s the foundation. You’ll understand what the company does, how it makes money, what challenges it faces, and how the financials have trended over five years.
Read the 10-Q when you’re tracking a company you already know. It answers the question: what happened this quarter? Did revenue grow? Are margins improving? Did anything significant change?
Apple Inc. (AAPL)’s 10-K runs about 80 pages. Its 10-Qs are around 40 pages each. If you’re just checking in on a quarter’s results, the 10-Q is the faster read. If you’re trying to understand Apple’s business from scratch, start with the 10-K.
Quick reference
| 10-K | 10-Q | |
|---|---|---|
| Frequency | Once per year | Three per year |
| Financials | Audited | Unaudited |
| Scope | Full business overview | Quarterly update |
| Length | 60-150 pages | 30-60 pages |
| Deadline (large filers) | 60 days | 40 days |
Frequently asked questions
- What is the main difference between a 10-K and a 10-Q?
- The 10-K is the annual report: audited, comprehensive, and filed once per year. The 10-Q is the quarterly update: unaudited, shorter, and filed three times per year for Q1, Q2, and Q3. The 10-K covers the full fiscal year including Q4, so there is no Q4 10-Q.
- Which is more reliable, the 10-K or the 10-Q?
- The 10-K is more reliable because the financial statements are audited by an independent accounting firm. The 10-Q financials are only reviewed, not fully audited, meaning they are subject to revision. For investment decisions requiring high confidence in the numbers, the 10-K is the authoritative source.
- Do I need to read both the 10-K and the 10-Q?
- It depends on your goals. Read the 10-K annually for a comprehensive picture of the business. Read 10-Qs when you want to track quarterly progress, monitor changes in guidance, or catch new risk disclosures that appear between annual reports. For a company you follow closely, reviewing both gives the fullest picture.
- What does a 10-Q include that the 10-K doesn't?
- The 10-K is the more comprehensive document, but the 10-Q is not a strict subset. A 10-Q can contain interim updates to risk factors, legal proceedings, and internal controls that have not yet appeared in the most recent 10-K. The value of the 10-Q is timeliness: it captures developments between annual reports.
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