The Spanish mistakes learners actually make, by level

Which Spanish grammar points do learners get wrong most?

The most common Spanish mistake our learners make is with the present tense — 638 wrong attempts out of 2,843 (22%), across 47 learners. It is the most common because it is the most used: every conversation runs on it. The next two are preterite (35% wrong) and ser vs estar (33% wrong).

Which Spanish grammar points are the hardest?

Frequency is not difficulty. Ranked by how often an attempt goes wrong, the hardest Spanish structure in our data is the present subjunctive: 67% of 182 attempts by 45 learners came out wrong.

What trips learners at each level?

Learners are grouped by the level our free test placed them at. A structure is listed for a level only when at least three learners at that level attempted it twenty times or more between them.

• A1 — 19 learners. Hardest: preterite (100%), present tense (31%), ser vs estar (25%).
• A2 — 24 learners. Hardest: present subjunctive (71%), present perfect (53%), modal speculation (53%).
• B1 — 9 learners. Hardest: present perfect (57%), por vs para (57%), object pronouns (39%).
• B2 — 10 learners. Hardest: present subjunctive (60%), imperfect subjunctive (58%), modal speculation (46%).
• C1 — 6 learners. Hardest: present subjunctive (55%), object pronouns (40%), por vs para (35%).

What do the mistakes actually look like?

These are learners' own fragments, exactly as our correctors marked them — shortened to the part that changed, with nothing that could identify anyone.

Why does this look different from a textbook's list?

A textbook orders grammar by when it is taught. This page orders it by when it goes wrong. That is why the present tense — taught in week one — tops the first table: it is attempted thousands of times, so even a low rate makes a lot of mistakes. And it is why the present subjunctive tops the second: fewer attempts, but most of them wrong.

How was this measured?

Nivelo's AI conversation partner tags every structure a learner attempts in a session and whether it came out right; the writing coach lists each correction with the fix. The numbers here are those records added up across 70 learners and 6,959 attempts (555 written corrections from 36 of them), last recounted on 2026-09-24. It is a measurement of our learners, not a study: the grader is a language model, levels come from our free test (aligned to the CEFR, not an official certification), and the sample is who happens to use the app.

Start with your level, not the top of the table

Start with the row for your level above, not the top of the first table. If you do not know your level, take the free Spanish level test — it takes five minutes and places you on the same scale this page uses. Then open the grammar reference for the structure your level gets wrong most: the drills there are now built around these exact mistakes.

Is the subjunctive the hardest thing in Spanish?

In our data the hardest structure is the present subjunctive, wrong 67% of the time. Whether that is "the hardest thing" depends on what you count: by sheer number of mistakes, the present tense wins, because it is used far more often.

How often does this page update?

The counts are recomputed from the app's records and republished with the site; the date of the last recount is in the method section above (2026-09-24). As more learners use the app, the tables get more stable and more levels reach the three-learner floor.