in relation or depends [NATIVE]

How do you naturally say this statement?

--The amount of subsidy (rent supplement) allotted to a person is in relation to their rent.
--Rent subsidy (supplement) is in relation to their rent. The higher the rent, the higher the subsidy.
--Rent subsidy depends on their rent. The higher the rent, the higher the subsidy.
--Depending on the amount of your rent, you are allotted rent subsidy (supplement) to help with your rent.

Thank you in advance