Leasing mistakes grouped by exactly when the bill lands

Lease mistakes are easiest to understand sorted by when the bill arrives. Some cost money on the day you sign, some show up in the first year, and some sit quietly for years before landing all at once when you leave.

Sorted that way, the mistakes that hurt most have the longest delay between the decision and the invoice.

What to take away

The bill arrives at signature

1. Comparing buildings on the quoted rate.

The quote is one component of occupancy cost. Two buildings quoted identically can differ substantially once the running costs, the measurement basis and the fit-out are in the model. Compare total cost over the term or you are not comparing.

2. Accepting an area figure without asking how it was measured.

Different bases include different amounts of shared space. If you do not know which was used, you do not know what you are paying for, and the difference is not trivial.

3. Signing a guarantee as part of the paperwork.

A guaranty is a separate obligation from the lease. It commonly survives things people assume end it, and it deserves its own reading and its own negotiation. Whether it can be capped or released after a period of successful trading is a conversation you can only have before signature.

The bill arrives in the first year

4. Not asking for the reconciled service charge history.

A budget is a forecast. Reconciled statements for the last two or three years are what happened. If they are refused, price the space assuming the worst plausible outcome.

5. Missing the base year mechanics.

Where costs above a base year are shared, what sits inside that base year decides how quickly your bill grows. A base year set in an unusual period, or one that excludes items later added, produces increases nobody predicted.

6. Letting rent start on a calendar date.

If the space is not ready or the permits are still in a queue, you are paying for something you cannot use. Tying the commencement to delivery in an agreed condition moves that risk, and it is negotiable while the letter of intent is open.

7. Taking possession without recording the condition.

Whatever repair obligation you accepted is measured against the state you took it in. A dated photographic record is cheap on day one and impossible to reconstruct later.

The bill arrives mid-term

8. A permitted use clause too narrow for the business you become.

The clause is written from the description you gave. Describe what you do and what you might plausibly do, because renegotiating it later means asking for something when you have nothing to trade.

9. Assuming you can pass the lease on.

Whether you can transfer it decides whether the lease is an asset or only a liability. The concept is assignment, and the conditions attached are where the value is won or lost. Many tenants also remain liable after a transfer, which surprises people.

10. Not reading the clauses that let the landlord change your position.

Relocation and redevelopment rights are ordinary and they cap how much you should invest in the space. If you are fitting out heavily, these clauses are part of the fit-out decision, which is why they belong beside the numbers in tenant improvements.

11. Signing a certificate about your own lease without reading it.

A lender or a buyer will eventually ask you to confirm the state of the lease. That device is an estoppel certificate, and confirming something inaccurate can cost you a right you actually had.

The bill arrives at the end

12. Never modeling the exit.

What you owe on the last day is decided on the first. Reinstatement, condition, and what happens to what you built are all set by clauses agreed at the start, and the underlying obligation not to leave the property worse is summarized as the law of waste.

13. Missing a notice date.

Break rights and renewal options run on exact dates and exact methods. A right exercised a day late or by the wrong means is not a right. Diarize every date in the lease the week you sign it.

14. Staying on after the term without an agreement.

Remaining in occupation makes you a holdover tenant, and the position that follows is usually expensive by design. Start the conversation about what comes next long before the term ends.

The fourteen, by how long the fuse is

Every column but the last was decided before signature. That is the whole argument for spending money on advice early rather than late.

What actually prevents them

Read the lease yourself once, in its own order. Take a written list of questions to a property lawyer. Model the total occupancy cost across the term rather than the monthly rent, using the approach in commercial leasing.

Confirm separately that your activity is permitted at the address, because the lease does not settle that and the way to find out is in zoning and permits. And before any of it, be sure you need this much space, which is what office space is for.

Common questions

Which of these is most expensive?

Usually the exit, because it arrives with no revenue attached and no way to defer it. The most frequent is the rate comparison, because it happens on almost every deal.

Is a lawyer worth it on a small lease?

The document is often the same length whether the space is small or large, and so are the obligations. What changes is how much you can afford to be wrong.

Can I renegotiate a clause mid-term?

Sometimes, if the landlord wants something from you. Absent that, you are asking for a favor. This is why the letter of intent is the moment that matters.

What is the single best habit?

Diarize every date in the lease during the week you sign it. It costs an hour and it prevents the most avoidable category on this page.