De or het loondoorbetaling?

The correct Dutch article is:

de loondoorbetaling

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

How to use loondoorbetaling

the loondoorbetalingde loondoorbetaling
this loondoorbetalingdeze loondoorbetaling
that loondoorbetalingdie loondoorbetaling
our loondoorbetalingonze loondoorbetaling
your loondoorbetalingjouw loondoorbetaling
every loondoorbetalingelke loondoorbetaling
which loondoorbetaling?welke loondoorbetaling?
a big loondoorbetaling / the big loondoorbetalingeen grote loondoorbetaling, de grote loondoorbetaling