Yes, COVID test kits expire, but the FDA extended shelf life for many brands by months beyond the printed date — check your lot online first.
A drawer full of expired COVID test kits could still be usable. The catch: you have to verify the lot number before tossing them. The FDA has granted shelf-life extensions for many popular at-home tests, sometimes adding a full year beyond what’s stamped on the box. Before you throw away that BinaxNOW or iHealth kit from 2024, a two-minute check could confirm it’s still good. Here’s which tests qualify, how to verify your specific kit, and when you really should discard one.
Why the Printed Date Isn’t Always the Real Expiration
When the FDA first authorized at-home COVID tests, manufacturers set shelf lives based on early stability data — conservative estimates that assumed the worst. As real-time aging studies came in, many brands proved their tests lasted longer than originally projected. The FDA then issued official extensions for specific lot numbers already on shelves and in homes.
That box of BinaxNOW tests stamped “expires March 2025” might actually be valid through January 2026 or later, as long as the lot number appears on the FDA’s extension list. The printed date was the first estimate, not the final word.
One catch: newer kits manufactured after late 2023 ship with their true, final shelf life printed directly on the box. The extension window applies to older inventory only — fresh production batches don’t need it.
Which COVID Test Kits Have Extended Shelf Life?
Most major brands have at least some lots with FDA-authorized extensions. The table below shows current shelf life data as of mid-2026.
| Brand & Test Model | Original Shelf Life | Extended Status |
|---|---|---|
| Abbott BinaxNOW COVID-19 Ag Card Home Test | 22 months | See Box Label (check lot) |
| Abbott BinaxNOW COVID-19 Antigen Self Test | 22 months | See Box Label (check lot) |
| Genabio COVID-19 Rapid Self-Test Kit | 18 months | See Box Label (check lot) |
| OHC COVID-19 Antigen Self Test | 8 months | Extended to 12 months |
| iHealth COVID-19 Antigen Rapid Test | 15 months (varies by lot) | Varies by lot number |
| iHealth COVID-19 Antigen Rapid Test | 18 months (varies by lot) | Varies by lot number |
| iHealth Flu A&B/COVID-19 3-in-1 Rapid Test | 20 months | Not specified |
| Newer kits (late 2023 or later) | Final shelf life printed | No extension needed |
“See Box Label” means the specific extended date depends on your kit’s lot number — you must verify it against the FDA’s lookup tool rather than relying on a universal cutoff.
How to Check Your Test’s Real Expiration Date
The verification process takes less than two minutes. Follow these steps exactly:
- Find the lot number and printed date. Look on the outer box or the individual foil pouch near the expiration stamp. The lot number is usually labeled “Lot,” “LOT,” or “Lot Number” followed by a string of letters and numbers.
- Open the FDA’s official test list. Navigate to the FDA’s at-home COVID test webpage, which alphabetically lists every authorized OTC test and its current expiration status.
- Find your brand. Scan the alphabetical list or use the page search. Look at the “Expiration Date” column — brands with extensions display a hyperlink reading “Extended Expiration Date.”
- Click the link and enter your lot number. That hyperlink opens a lot-specific lookup tool. Type your full lot number exactly as printed. If it appears in the database, the test expires on the new date shown — not the old box date. If it doesn’t appear, the printed date is final and the kit must be discarded.
- Follow usage rules. Bring a valid kit to room temperature (59–86°F) before testing. Read results within the brand’s specified window — usually 15 to 20 minutes. Reading too late can produce a false positive line.
Common Mistakes That Waste Good Tests
The most frequent error is tossing a test the day after its printed date without checking for an extension. A close second is finding an extension on the FDA list but skipping the lot-number lookup — extensions vary within brands, so your specific box might not qualify even if the brand generally does.
Another common pitfall: reading results too late. A faint second line that appears after 25 minutes looks like a positive result but is actually invalid. The manufacturer’s time window — typically 15 to 20 minutes — is the only reliable read zone.
| Situation | What to Do | Why |
|---|---|---|
| Printed date passed, lot not verified | Check FDA lot lookup first | Extension may apply to your batch |
| Lot verified on FDA extension list | Use through new extended date | FDA confirms reagent stability |
| Lot not on list, past printed date | Discard in household trash | Test components have degraded |
| Test past its extended date | Discard | Accuracy drops sharply after cutoff |
| Results read past manufacturer’s time | Invalid — retest with fresh kit | Window is the only valid read zone |
When You Should Definitely Toss an Expired Test
If your lot number doesn’t appear on the FDA extension list, the printed date stands. Using the test past that point risks a false negative — the antibodies and reagents break down over time, making the kit less sensitive to viral proteins. You could be infected and contagious but get a clean result.
Dispose of truly expired tests in normal household trash. Secure the packaging so nobody mistakes an old kit for a valid one.
If you need a fresh supply, our roundup of the best COVID test kits covers reliable options for home use with current expiration dates.
The bottom line: that box of tests in the back of your bathroom cabinet may still be usable. Check the lot number first, verify on the FDA site, and use the extended date if one exists. If no extension applies, toss it honestly and grab a fresh box.
FAQs
Can I use a COVID test that expired yesterday?
If yesterday was the printed box date, check the FDA extension list first — that test could still be valid for months. If yesterday was the extended date listed on the FDA lookup, the test is truly expired and should be discarded.
How long past expiration are tests still good?
It depends on the brand and lot. Some tests have received 7 to 12 months of additional shelf life beyond the printed date. The only way to know for sure is to verify your specific lot number on the FDA website.
Do all COVID test brands have extended expiration dates?
No. The FDA has granted extensions for many major brands including BinaxNOW, iHealth, OHC, and Genabio, but not every test or every lot qualifies. Always check the official list rather than assuming.
What happens if I use a truly expired test?
The biggest risk is a false negative. The chemical components in the test degrade over time, reducing its ability to detect the virus accurately. A negative result from an expired test is not trustworthy.
Where do I find the lot number on my test kit?
Look on the outer box or the individual foil pouch near the expiration date. It’s usually labeled “Lot,” “Lot Number,” or “LOT” followed by a combination of letters and numbers.
References & Sources
- FDA. “At-Home OTC COVID-19 Diagnostic Tests.” Official list of authorized tests with expiration date extensions and lot lookup.
- iHealth Labs. “Expiration Date Information.” Details on iHealth test shelf life by lot number.
- Mayo Clinic News Network. “Mayo Clinic Minute: COVID-19 at-home tests and expiration dates.” Clinical guidance on test accuracy and expiration.
- Ohio State Health. “COVID-19 home tests expiration date extension.” Step-by-step verification instructions for consumers.
- Health.com. “Can You Still Use an Expired COVID Test?” Safety and accuracy information for expired test use.