"With answers" is the phrase that separates practice from homework you can never hand in. A practice test without an answer key is reading material; a test with answers - and better, with explanations - is a measuring instrument.
This guide covers where to get genuinely good IELTS practice tests with answers in 2026, and the marking method that turns keys into band scores.
Short answer: the best sources in 2026 are IELTSbiz for unlimited Cambridge-style practice with instant scoring and explained answers, the official Cambridge IELTS books for authentic past papers with keys, and ielts.org plus ieltsonlinetests for free samples and volume. Choose sources that explain answers, not just list them.
Full disclosure before we go further: IELTSbiz is our own platform, so weigh that as you read. Every other source below is described fairly, strengths first - and the Cambridge books in particular are something we recommend to every candidate without hesitation.
| Source | Best for | Answers include explanations? | Price (as of 2026) |
|---|---|---|---|
| IELTSbiz | Unlimited fresh reading practice, scored with trap-level explanations | Yes - why each wrong option tricked you | Free daily practice; Pro $6.99/month or $29 lifetime |
| Cambridge IELTS books (15-19) | Authentic official past papers | Keys only, minimal explanation | About $25-40 per book |
| ielts.org official samples | Free authentic samples from the test maker | Keys only | Free |
| ieltsonlinetests.com | High-volume free timed mocks | Keys, some community explanation | Free with ads; paid tier |
| British Council / IDP prep hubs | Official free practice for registered candidates | Keys, sample answers with comments | Free (fullest with a booking) |
| IELTS Liz | Practice lessons with answers explained by an ex-examiner | Yes, teaching-first | Free |
1. IELTSbiz - practice with answers that explain themselves
IELTSbiz reading practice generates fresh Cambridge-style passages across all eleven question types, grades your answers instantly, and - the part that changes outcomes - explains every wrong answer at trap level: which distractor caught you, why the wrong option looked right, and where in the passage the correct answer hid.
Because every session is scored by question type, your answers feed a running estimated band per type. Instead of finishing a test with "31/40, not bad", you finish with "True/False/Not Given is costing you three marks per test" - a study plan, not just a score.
The band estimates rest on validated grading: IELTSbiz's study of 1,200 essays found AI band scores matched human examiners within ±0.5 bands in 94.2% of cases.
Daily practice is free with no card; unlimited sessions are $6.99/month or $29 lifetime (pricing). The fair limits: it is reading-focused practice rather than a four-section mock simulator, so pair it with full papers from the sources below for test-day stamina.
2. Cambridge IELTS books - the official gold standard
The Cambridge IELTS series (books 15 through 19 are the most current as of 2026) contains real past papers released by the test maker. Nothing else matches their authenticity: the passages, recordings, question style and difficulty are the exam, because they were the exam.
Every book includes answer keys, listening transcripts and sample Writing answers with examiner comments. Four full tests per book make each one roughly a month of weekly mocks.
The honest limits: keys tell you the right answer but rarely why yours was wrong, the books cost $25-40 each, and - the trap nobody mentions - they are finite. Redoing a test you half-remember measures memory, not skill. Use them as calibration mocks and generate fresh material for daily practice.
3. ielts.org - free official samples
The test maker's own site offers free sample questions for every section and module, with answer keys. The set is small - think of it as the official trailer rather than the film - but it is free, authentic and the right first stop for a candidate who has never seen the question formats.
The limitation is volume: you will exhaust the samples in a week. Treat them as format orientation, then move to the volume sources.
4. ieltsonlinetests.com - maximum free volume
ieltsonlinetests hosts one of the largest free libraries of timed IELTS mocks online, with answer keys and score conversion built in. For sheer volume of full timed tests at zero cost, nothing beats it, and the timed test player enforces real exam pacing.
The trade-offs: the free experience is ad-heavy, test quality varies since materials are not official past papers, and explanations are thin - often just the key plus community comments. Best for stamina training and volume once you know your weak areas. Our ieltsonlinetests alternatives guide covers how to pair it with analysis tools.
5. British Council and IDP prep hubs - official and free
Both co-owners of IELTS run free preparation hubs with practice tests, answer keys and sample Writing and Speaking answers annotated with examiner comments. Registered candidates typically unlock fuller packages - as of 2026, booking with participating centres often includes structured self-study courses.
The annotated sample answers are the standout: they show the marking standard applied to real responses, which no answer key can.
The limits: volume is modest compared to dedicated libraries, and the fullest materials are tied to a booking. Use them for calibration and official-standard samples.
6. IELTS Liz - answers taught, not just listed
IELTS Liz's practice lessons come with answers explained from an ex-examiner's perspective: not just "the answer is B" but why B, and why the option you chose was the trap. As free teaching material, the quality is genuinely high, and the site's question-type lessons pair naturally with practice from any other source.
The limits: it is a lesson library rather than a test simulator - no timed test player, no score tracking - and the practice volume is designed for teaching, not for weekly mocks. Best used to understand question types deeply, alongside a volume source. See our IELTS Liz alternatives and complements guide.
How to mark your own test like an examiner
Strictness first: spelling counts in Listening and Reading, answers over the word limit are wrong regardless of content ("in the morning" fails a two-word limit even if morning is right), and there is no partial credit. Every generous self-mark inflates your practice band and sets up a test-day surprise.
Then convert, every time: count correct answers and turn them into a band - approximately 30/40 for Band 7 in Listening and Academic Reading, 34/40 in General Training Reading. The free Band Score Calculator handles both modules and your projected overall. A raw score is trivia; a band is information.
Finally, log errors by question type, not by test. Ten wrong answers scattered across a test feel random; sorted by format, they almost always cluster into two or three types. That cluster is your study plan for the next fortnight. Our reading traps guide names the five traps behind most clusters.
The weekly routine that turns tests into bands
One full timed test per week is calibration; daily 20-30 minute targeted practice is treatment. Sit the weekly mock under strict conditions, mark it ruthlessly, convert to a band, and update your error log. Then spend the week's short sessions attacking your top weak question type with focused practice and explained answers.
Re-test the weak type ten days later. If the cluster shrinks, move to the next type; if not, the strategy - not the effort - needs changing, and a question-type lesson is worth an hour before more drilling.
Candidates who follow this loop typically need fewer total tests than candidates who binge mocks, because every test changes the next week's plan. Practice tests with answers are everywhere in 2026; practice tests with consequences are what move bands.