This IELTS TOEFL Duolingo comparison exists because most international programs require proof of English proficiency (or, less commonly, another language), and increasingly, standardized admissions tests for specific programs. Picking the right exam — and preparing efficiently rather than over-preparing — saves both money and months.
Language proficiency exams
IELTS is the most widely recognized English proficiency test globally, accepted by the large majority of UK, Australian, and Canadian universities, and most US universities as well. TOEFL iBT is preferred by many US universities and some graduate programs elsewhere; check your specific target universities, since acceptance isn’t universal. Duolingo English Test has gained wide acceptance, particularly in the US, as a faster and cheaper alternative — but not every university accepts it, so confirm before relying on it exclusively. Which one to take depends entirely on what your target universities list as accepted — taking the “wrong” one for your target list, however well you score, wastes both money and time. Full breakdown: IELTS vs TOEFL vs Duolingo: which one do UK/US/Canada universities actually accept? If cost is the deciding factor, see IELTS prep on a budget and whether the Duolingo English Test is the cheaper, faster option for your target schools. Considering PTE instead? Here’s whether PTE Academic is worth taking over IELTS or TOEFL.
Admissions tests
GRE is required or accepted by many graduate programs, particularly in the US, though a growing number of programs have made it optional. GMAT remains the standard for many MBA and business master’s programs, though some now also accept the GRE. See our full comparison: GRE vs GMAT: which test do you actually need for grad school abroad? SAT/ACT apply mainly to undergraduate admissions in the US; requirements have shifted significantly in recent years, with many universities now test-optional — confirm current policy for each target school rather than assuming.
How to prepare efficiently
Score requirements vary by university and program — a score that’s more than sufficient for one target might be marginal for another. Check the specific minimum (and, where available, the average admitted score) for each program on your list before deciding how much prep time to invest, rather than aiming for a generic “good score.”
Choosing between this IELTS TOEFL Duolingo comparison and other tests
Not every university accepts every test, which is the first thing this IELTS TOEFL Duolingo comparison should help you check before you register for anything. IELTS and TOEFL are accepted almost everywhere and are the safe default if you’re not sure yet where you’ll end up applying. Duolingo is faster and cheaper, and a growing number of universities accept it, but some of the most selective programs still don’t — always confirm on the specific program’s admissions page, not a general policy page, since exceptions are common. PTE Academic sits in between: widely accepted in the UK and Australia, less so in the US. If you’re applying to more than one country, pick the test with the broadest acceptance across your shortlist rather than the one that’s easiest to prepare for.
Common test prep mistakes that cost applicants time and money
The most common mistake is booking the test date before checking the specific score requirement for your target programs, then re-registering (and paying again) after realizing the first attempt fell short. Check the minimum score for your most competitive target program first, and prepare for that number, not a generic “good score.” The second mistake is over-preparing for months when four to eight focused weeks of practice tests and targeted weak-area work gets most applicants to their target band. The third is ignoring the sub-scores — many universities set separate minimums for writing or speaking, so an application can be rejected on a strong overall score with one weak section.
Where to go next
Once you know your required scores, see Admissions & Applications for how test scores fit into the rest of a strong application, and Scholarships & Funding — some scholarships have their own minimum score requirements separate from the university’s.