De or het loondifferentiatie?

The correct Dutch article is:

de loondifferentiatie

Rule Words ending in -tie and -sie: almost always de. See the rule

How to use loondifferentiatie

the loondifferentiatiede loondifferentiatie
this loondifferentiatiedeze loondifferentiatie
that loondifferentiatiedie loondifferentiatie
our loondifferentiatieonze loondifferentiatie
your loondifferentiatiejouw loondifferentiatie
every loondifferentiatieelke loondifferentiatie
which loondifferentiatie?welke loondifferentiatie?
a big loondifferentiatie / the big loondifferentiatieeen grote loondifferentiatie, de grote loondifferentiatie