Belgium

Budget

Budget
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Couchsurfing

has a lot of members in Belgium

Budget
$
Vrienden op de fiets

If you are travelling in Flanders by bicycle or by foot, there is a list of 260 addresses where you can stay at private homes with bed and breakfast for no more than €19,00 per person per night, although you must also pay €8 for membership of this scheme.

hotels

Belgium has many fine hotels. Capital Brussels has countless rather expensive business hotels catering to the European Union's bureaucrats, and while you can usually get a good room for under €100, prices can spike if there's a big EU shindig in town.