Applying for a masters in Belgium without a consultant, does that increase the risk of a student visa rejection?

You can absolutely apply for your Belgium masters visa on your own without increasing your rejection risk, since the immigration office judges your file on its actual content rather than who helped you compile it. What does raise your risk is skipping the careful, document heavy checks that a consultant would normally catch, so the responsibility for precision simply shifts fully onto you.

The real reasons Belgium rejects student visas

Your DIY application checklist

• Transfer your living expenses into your university's blocked account rather than relying on a private sponsor, since the resulting Financial Solvency Certificate is rarely questioned by the embassy.
• Write an original motivation letter that clearly connects your chosen program to your long term career goals, rather than copying a template.
• Pay the mandatory Belgian administrative fee, roughly EUR 230 to 240, before submitting, and keep the physical proof in your file.
• Cross check that your passport, acceptance letter, insurance policy, and flight booking all show matching name spellings and consistent dates.

My Advice

Build your application around the blocked account route from the start, since it removes the single biggest rejection trigger, and spend a full evening just cross checking dates and spellings across every document, since that quiet, unglamorous step is exactly what a consultant would normally catch on your behalf.