De or het negotiepenning?

The correct Dutch article is:

de negotiepenning

Rule Words ending in -ing: almost always de. See the rule

How to use negotiepenning

the negotiepenningde negotiepenning
this negotiepenningdeze negotiepenning
that negotiepenningdie negotiepenning
our negotiepenningonze negotiepenning
your negotiepenningjouw negotiepenning
every negotiepenningelke negotiepenning
which negotiepenning?welke negotiepenning?
a big negotiepenning / the big negotiepenningeen grote negotiepenning, de grote negotiepenning