An average maximum annual rental increase is above 5% with CPI percentage change. Ensure to check the CPI indexes as there are different CPI indexes in many cities and regions in the US. You can increase the rent after passing the initial 12-month period only two times according to the laws. It is essential to notify your tenants 60 days before the lease expiration. The local CPI of your supposed property is 3%, but you can quickly increase 8% to the rent.