California Residential Lease

Is it legal in California that offer a 5% adjustment in the rent of a lease contract as an incentive / penalty if the tenant pays the rent before / after the due date? Some tenants are not too good to pay, as expected, but then they pay one day or two later.

It is legal to offer an incentive.

You can fine equal to rent if rent days per day of delay. If the rent is 900 a month maximum, you can fined for late payment is 30 per day.

As long as it is in the lease, the right CA does not object. The late charges are certainly allowed to pre-payment of bonuses should be equally browned. The state does not really care if the landlord offers incentives of their own pocket.

The only charge that the end does not apply are those that are "unreasonable". 5% would be quite reasonable. Some parts of CA have limits on late fees, and a more thorough search of county and city laws may be justified.