PL-300 study resources

The best PL-300 resources are free: Microsoft’s study guide with the skills outline, the official practice assessment, the Power BI documentation, and Power BI Desktop itself, which you can install at no cost. Add realistic practice questions to find your weak domain. The thing to be careful with is outdated material, because Power BI ships changes monthly and the outline has been revised, so older courses can miss features the current exam names.

Start with the official material

The study guide and skills outline. Microsoft’s PL-300 study guide lists the four domains, every objective, the change log and the date of the current version, April 20, 2026. Read it before anything else and keep it open while you study.

The practice assessment. Microsoft offers a free official practice assessment for PL-300. Take it once at the start and again near the end. It is the closest thing to the real exam’s tone and difficulty.

Microsoft Learn training. The official exam page, learn.microsoft.com/en-us/credentials/certifications/exams/pl-300/, points to self-paced learning paths and instructor-led courses for the exam. Use them for structure, but treat them as a starting point: the modules explain features, and the exam asks you to apply them to a scenario.

The Power BI documentation. The Power BI documentation is the best source for each feature on the outline: Power Query, DAX concepts, relationships, row-level security, workspaces and apps. The exam is written against the behaviour it describes.

Exam prep video and the sandbox. Microsoft’s Exam Readiness Zone has a PL-300 prep video on preparing the data, and the exam sandbox shows the interface and question types in ten minutes.

Lab work is the differentiator

PL-300 describes a model or a requirement and asks what to build, change or configure. Four labs cover most of it:

1. Clean and shape. Take two messy files, import them, profile with the entire data set, fix types and nulls, unpivot months, merge and append, split into fact and dimension queries with a reference, and drive the source path with a parameter.
2. Model and calculate. Build a star schema with a date table marked as such. Write total, percent of total, year to date, last year and a closing-balance measure. Add an inactive date relationship and use USERELATIONSHIP. Create a calculation group.
3. Report and tell a story. A three-page report with a drillthrough page, a tooltip page, a bookmark toggle, a synced slicer, conditional formatting, alt text and a phone layout. Run Explain the increase and add a forecast.
4. Publish and secure. Publish to a workspace, create a dynamic RLS role with a mapping table, test with View as, add test accounts in different workspace roles, build an app with audiences, schedule a refresh and add a dashboard data alert.

A free Power BI Desktop install and a sample dataset are enough for labs 1 to 3. Lab 4 needs the Power BI service, and some features need a licence or a trial; check which your organisation provides.

Worth paying for

Practice tests written against the current outline. Their value is diagnosis: they show which domain is weakest while there is still time to fix it. The free 20-question test here is weighted like the real exam and is a good first check.

A real project. A report you build for your own team teaches more about requirements, relationships and refresh than any course.

What to avoid

Outdated courses. If a resource describes an older version of the exam, never mentions Copilot, visual calculations or Direct Lake, or has no section on row-level security membership, it predates the current outline. Use it only alongside the official skills list.

Braindumps. They break Microsoft’s exam agreement, risk revocation of every certification you hold, and do not help with scenario questions that describe a situation rather than recite a fact.

Tool tours without understanding. Memorising where a button is does not help when the exam asks which feature meets a requirement. Learn what each feature does to filter context, rows or access.

A sensible order

1. Read the study guide once and take the official practice assessment cold.
2. Work through the four domains using the documentation and the labs above, following the four-week study plan.
3. Take the practice test and find your weakest domain.
4. Go back to that domain’s guide and repeat its lab.
5. Book once you score 80% or more on realistic questions twice in a row.

Is this the right exam?

If you build reports and models in Power BI, yes. If your work is the Fabric platform underneath, DP-600 fits better; see PL-300 vs DP-600. For whether the credential is worth your time, read is PL-300 worth it?