How differential rent works
Under HAP, your council pays your landlord the full agreed rent each month. In return, you pay a weekly contribution — called differential rent — directly to the council. The council covers the gap.
Your differential rent is calculated as a percentage of your net household income. The higher your income, the more you contribute — but HAP still tops up whatever you don't cover, up to the HAP rent limit.
How the calculation works
What changes your contribution
- 1
Your income goes up
Pay rise, new job, more hours — your contribution increases at the next annual review. You must report income changes to your council. Don't wait for the review — report it when it happens.
- 2
Your income goes down
Lost your job, reduced hours, reduced social welfare — your contribution decreases. Contact the council immediately and ask for your differential rent to be recalculated. Don't keep paying the higher amount.
- 3
Household composition changes
A partner moves in or out, a child is born, a dependent leaves — these all affect the calculation. Notify your council of any changes to who lives in the household.
- 4
Annual review
Every year the council reviews your income and recalculates your contribution. They'll write to you asking for updated income documents. Respond promptly — delays can cause arrears.
Related HAP guides
Need help with your HAP form?
Photograph it and get field-by-field guidance in your language — free, no account needed.
Scan my HAP form →