Additional rent

Additional rent covers things like CAM, insurance, and taxes on a commercial lease, or utilities and pet rent on a residential lease. Because they are treated as rent, non-payment triggers the same enforcement path as base rent.

A tenant's monthly bill is $2,000 base + $200 additional rent for CAM = $2,200 total rent.

The label decides the remedy. If a charge is additional rent, an unpaid balance can be pursued through the same notice-and-cure path as unpaid rent. If the lease treats the same charge as a fee, you may be left chasing it as an ordinary debt, which is slower and far weaker.

Bill additional rent on the same statement and the same due date as base rent, itemized on its own ledger line. Keeping the lines separate lets you report base rent accurately for rent-roll and valuation purposes while still enforcing the full balance as rent.

The common errors are burying additional rent in one undifferentiated rent number, and applying payments to the newest charge instead of the oldest. Both make a balance impossible to explain later. Whether a specific charge can be enforced as rent depends on your lease language and your state's law — have the lease reviewed rather than assuming.