Written byFizza Butool ZaidiIELTS teacher for 10+ years, PTE for 5Updated 30 October 2026
The 21-day rule
Duolingo's help centre gives you 21 days to take a test from your original purchase date. Unused credits expire after that, and the expiry date cannot be extended. The same limit appears in its general test rules.
| Purchase | Time to use it |
|---|---|
| Single test (one credit) | 21 days from purchase |
| Two-test bundle, first test | 21 days from purchase |
| Two-test bundle, second test | A further 21 days after you receive your first result |
What one credit includes
A single test gives one credit and a bundle gives two. Each credit allows one certified result and three attempts to complete and upload the test; every start counts as an attempt (help centre). A credit can also end early: two rule violations, or one case of possible misconduct, make it expire (help centre). Bundle credits cannot be shared between accounts (help centre).
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Planning around the deadline
Before buying, check you have a Windows or macOS laptop or desktop, valid ID and an internet connection of at least 2 Mbps download and 1 Mbps upload, ideally wired (rules, help centre). The free practice test needs only an account, so you can try it before the 21 days start.
Bundle purchases are not refundable (help centre). For other problems, contact support within 24 hours of the issue; you are not eligible for a refund if you broke the test rules (help centre). Rules and fees change. Check the test owner's own page before you book or pay. This guide is general information, not official advice from ETS or Duolingo.
Frequently asked questions
Does a Duolingo English Test purchase expire?+
Yes. Unused credits expire 21 days after the original purchase date.
Can Duolingo extend my test credit?+
No. Duolingo says the expiry date cannot be extended.
How long do I have for the second test in a bundle?+
21 days after you receive the result of your first test.
Can I share a bundle credit with a friend?+
No. Bundle credits cannot be shared between accounts.
How many attempts does one credit give?+
Three attempts to complete and upload the test, for one certified result.
Keep reading
Related
- How many times can you take the Duolingo test?
- Duolingo English Test fee 2026
- Duolingo English Test practice test
- Duolingo English Test rules
- All 3112 guides
Guide updated on 30 October 2026. Individual prices and policies may have earlier observation dates. Confirm current details on the linked official pages before you book or apply.
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