Holdover rent: the multiplier, the base it multiplies, the start day

Holdover rent is what a tenant pays for occupying premises after the term ends without a new lease in place. Computing it takes 3 inputs and no more: a multiplier, the base that multiplier applies to, and the day the period begins. A record storing the multiplier alone produces a plausible number that can be wrong by a fifth.

The multiplier is the visible variable: it appears in negotiation, gets pushed from 200% down to 150%, and everyone remembers the outcome. The base definition is the quiet one. It sits in a subordinate clause, is rarely abstracted, and in a triple-net lease decides whether recoveries that nearly equal base rent are inside the calculation.

Two bills that differ only in what is being multiplied

The comparison worth keeping is between rows, not columns. Moving the multiplier from 150% to 200% on the narrow base adds 5,000 a month. Widening the base at an unchanged 150% adds 4,500. The first is negotiated in daylight and stored; the second is a reading nobody records, worth almost the same money.

Where base rent is index-linked rather than a fixed step, rent at expiry is computed rather than stored, so holdover inherits an escalation that must itself be right — the build-order argument in fixed steps or index-linked escalation. And if the base includes additional rent that was subject to a ceiling, the capped figure feeds the holdover bill, so whether the ceiling compounds matters here too: cumulative or non-cumulative expense caps.

The start day, and the part-month nobody agrees on

Holdover normally begins the day after the term expires, but leases vary on 2 points that change the bill at once. Some allow a grace period before the elevated rate engages. More consequentially, many charge by the whole month rather than pro rata, so vacating on the 2nd costs a full month at the multiplier.

That convention turns a 2-day overrun into an expense worth more than a month of ordinary rent, which is the most useful thing to tell a team planning a move. Store the proration basis as a field with 2 values, whole month or daily: on short overruns they differ by an order of magnitude, and neither is unusual.

What usually sits in the clause beside the multiplier

• A statement that holding over creates no new tenancy. Without it, continued occupation with rent accepted may be argued to have created a periodic tenancy.
• An indemnity for the landlord's losses — the exposure that can dwarf the rent where a successor tenant is signed and cannot take possession.
• A condition requirement on handback, whose clock may run from the original expiry rather than from actual vacation.
• Landlord access for marketing and viewings. A unit in holdover cannot be shown, and whichever touring model runs has to read that state before booking — the choice weighed in agent-led or self-guided touring.

The bill is the priced consequence of a date that passed

Most holdover is not a decision. It is what happens when an option lapsed, or a notice was served and rejected, and no time was left to relocate — which is why the option window, the expiry date and the holdover clause belong in 1 record rather than 3. A notice served on time and rejected anyway has its own diagnosis in the landlord says our renewal notice was late.

It also sets what an alert must say. Exposure flagged as high risk tells nobody anything. The useful output is the monthly sum under each reading of the clause, the date it starts and who has to decide — an action rather than a score, the test applied in AI in logistics operations.

The fields the record has to carry, per lease

• Multiplier, and whether it escalates — some clauses step from 150% to 200% after a stated number of months.
• Base definition, enumerated rather than free text: base rent only, or base rent plus additional rent.
• Start day and any grace period, as an offset from expiry.
• Proration basis, whole month or daily. This field decides what a short overrun costs.
• A flag where the clause carries an indemnity, so the alert can say the rent is not the whole number.

The multiplier gets negotiated in daylight. The base it multiplies is read once, by whoever abstracted the lease, and never again.

None of this is legal advice, and a holdover clause is a place to take some. What a system can do is store the 3 variables separately, compute both readings where the clause is ambiguous, and surface the difference early enough to act — with the rest across the lease administration topic. Building that record is scope we take under AI agents and automation for property teams.

• lease administration
• holdover
• lease expiry
• commercial leases