Commercial Lease Terms Decoded: What to Negotiate and Why

A commercial lease can run for five or ten years and commit you to hundreds of thousands in payments. Most first-time tenants focus on the rent per square foot and miss the clauses that matter more. Here's a plain-language guide to the terms you'll meet and what to ask for. It's general information, not legal advice — have a lawyer review any lease before you sign.

The headline rent is the number landlords want you to compare. The clauses decide what you actually pay each year, how much room you have if the business changes, and how much you personally stand to lose if it fails. The vocabulary also changes at the border: the same idea can be "CAM" in Chicago, "service charge" in London and "outgoings" in Sydney. We've grouped the clauses by what they protect, then added a country-by-country table and a worked comparison of two offers.

Rent structures

Type	What you pay	Watch for
Gross lease	One rent amount; the landlord covers most building costs.	Higher base rent; check what's excluded.
Modified gross	Base rent covers some costs; you pay others, such as utilities or increases above a base year.	Which base year is used and which costs can rise.
Net lease	Base rent plus some building costs.	Which costs are passed through.
Triple net (NNN)	Base rent plus your share of property tax, insurance and maintenance.	Unpredictable increases; ask for history and caps.
Percentage rent	Base rent plus a share of sales above a threshold.	Reporting obligations and the threshold level.

Measuring the space

Rent is charged on area, and area has more than one definition. In North America, office rent is usually charged on rentable area: your usable floor plus a share of lobbies, corridors and washrooms, added through a load or add-on factor. Two suites with the same usable area can carry quite different rentable figures. Ask for both numbers and the measurement standard used, then compare offers on cost per usable square foot or square metre. For shops, check whether a basement, mezzanine or storage room is charged at the same rate as the sales floor.

The money clauses

Common area maintenance (CAM)

CAM charges cover shared spaces and services. Ask for the last few years' actual CAM costs, what's included, and whether there's a cap on annual increases. Exclude capital improvements that mainly benefit the landlord. The same idea goes by other names elsewhere: service charge in the UK and Ireland, outgoings in Australia, Nebenkosten in Germany, and management fees or service charges across much of Asia.

Tenant improvement (TI) allowance

A TI allowance is money the landlord contributes to your fit-out. Landlords often offer more TI in exchange for a longer lease. Clarify how and when it's paid — upfront, in stages or as reimbursement. In the UK and much of Europe, the incentive more often arrives as a longer rent-free period or a capital contribution than as a TI cheque.

Rent-free period

A few months of free rent while you build out is common, especially where vacancy is high. Make sure the free period starts when you get access, not when you open. Check whether pass-through costs are also waived; often they are not.

Rent increases and reviews

Leases in the US and Canada usually build in fixed annual step-ups. Much of continental Europe indexes rent to an official price index, and UK leases traditionally include open-market rent reviews, often every five years. Ask how the increase is calculated, whether there's a cap, and whether a review can move rent down as well as up.

Deposits

Security deposits range from a month or two of rent in many markets to far larger sums in Japan, where office deposits of six to twelve months are common. Ask whether a bank guarantee or letter of credit can replace cash, whether the deposit earns interest, and exactly when and how it comes back.

Protecting your business

Use clause and exclusivity

The use clause defines what you may do in the space. Keep it broad enough to let your business evolve. An exclusivity clause stops the landlord leasing nearby space in the same building or development to a direct competitor.

Co-tenancy

In shopping centres or mixed-use developments, a co-tenancy clause can reduce your rent if key anchor tenants leave. It matters if your traffic depends on them.

Personal guarantee

Landlords often ask small business owners to guarantee the lease personally. Try to limit it — for example, to a fixed number of months' rent, or have it fall away after a period of on-time payments. A larger deposit can be offered instead; in the UK, a rent deposit deed is a common alternative.

Signage, hours and operations

Check your rights to exterior signage, any required opening hours, and rules about deliveries, noise and outdoor seating. Remember that the city has its own say: heritage districts restrict sign design, and in Québec, French must be markedly predominant on exterior commercial signs.

Term, renewal and exit

Term and renewal options

A shorter initial term with renewal options gives you flexibility. Make sure renewal rent is defined — a fixed increase or market rent with a cap. Statutory rights differ: in England and Wales, business tenants have renewal rights under the Landlord and Tenant Act 1954 unless the lease is "contracted out", which many shorter leases are. In France, the standard commercial lease runs on a nine-year 3-6-9 pattern, with the tenant normally able to leave at each three-year mark. In Japan, ordinary leases give tenants strong renewal protection, while fixed-term leases simply end on the agreed date.

Break clauses

A break clause lets you end the lease early on notice at set dates. In the UK, breaks are often conditional — rent paid in full, the space handed back empty — and courts apply those conditions strictly. Negotiate as few conditions as possible, and diarise the notice deadline.

Assignment and subletting

If you sell your business or need to exit, you'll want the right to assign the lease or sublet. Negotiate for the landlord's consent "not to be unreasonably withheld". Our guide to subleasing office space covers how that works in practice.

Reinstatement and make-good

Many leases require you to return the space to its original condition when you leave. Australians call it make-good, the UK calls the claim dilapidations, and Japanese leases usually require full restoration. It can be costly. Record the condition with dated photos on day one, and negotiate the right to leave approved improvements in place.

Relocation and demolition clauses

Some leases let the landlord move you to another space or end the lease for redevelopment. Negotiate for notice periods and compensation.

How lease conventions differ by country

Market	Rent usually quoted	On top of rent	Quirks to know
United States	Per sq ft per year	Nothing on full-service gross offices; taxes, insurance and maintenance on NNN retail	Personal guarantees are routine for small tenants
Canada	Per sq ft per year, net	Additional rent (taxes, maintenance, insurance); HST, or GST plus QST in Québec	Provincial law governs; five- to ten-year retail terms are common
UK and Ireland	Per sq ft per year	Service charge; business rates (UK) or commercial rates (Ireland); VAT where the landlord has opted to tax	Break clauses and periodic rent reviews
France and Germany	Per m² per year (France), per m² per month (Germany)	Service charges; VAT where it applies	France's 3-6-9 lease; German rents often index-linked
Australia	Per m² per year	Outgoings; GST	State retail-leases laws require a disclosure statement; make-good on exit
Japan	Per tsubo (about 3.3 m²) per month	Common-area charges; consumption tax	Large deposits; restoration on exit
Singapore and Hong Kong	Per sq ft per month	Service or management charges; GST in Singapore; rates in Hong Kong	Short terms with renewal options; stamp duty in Hong Kong
India	Per sq ft per month	Maintenance charges; GST	Leave-and-licence agreements; security deposits; stamp duty and registration
UAE (Dubai)	Per sq ft per year	VAT on commercial rent	Leases registered with Ejari; rent often paid by cheque in instalments

Conventions vary by building and landlord. Treat this as orientation, not legal advice, and have a local lawyer review any lease.

Worked example: comparing two offers

Two landlords offer similar shops on the same street for five years. To keep the maths clear, call Offer A's annual base rent 100 and express everything else against it. You'd pay utilities in both.

• Offer A: base rent 100 a year on a triple-net basis, with pass-throughs estimated at 30 a year; two months rent-free; no TI allowance.
• Offer B: base rent 120 a year on a gross basis; four months rent-free; a TI allowance worth 40 towards a fit-out you'd pay for anyway.

Five-year cost	Offer A	Offer B
Base rent over five years	500	600
Less rent-free period	−17	−40
Pass-through costs	+150	0
Less TI allowance	0	−40
Net cost	633	520
Effective cost per year	about 127	104

Offer B's headline rent is 20% higher, yet it's the cheaper lease — and A's pass-throughs could rise. Before you decide, check that you'd really spend the TI money, and that B's longer free period lines up with your fit-out timetable. Run the same comparison on every shortlisted space, then check the winner can carry its cost with the storefront revenue estimator.

The letter of intent

Most leases begin with a letter of intent (LOI) that sets out the main terms before lawyers draft the lease. In the UK it's usually called heads of terms; in Australia, a letter of offer or heads of agreement. It's usually non-binding, but it frames everything that follows, so negotiate the important points at this stage. Changing terms later is harder.

Working with a tenant broker

Tenant-side brokers represent the business, not the landlord, and are often paid through the landlord's commission. They know local rents, incentives and which landlords are flexible. In some markets the tenant pays the fee directly, so ask how your broker is paid before you engage one. For a first lease, a good tenant broker and a lawyer who specialises in commercial leases can save far more than they cost. Read our explainers on tenant rep brokers and negotiating rent for the tactics.

A negotiation checklist

1. Total occupancy cost estimate for year one and year five.
2. Measurement standard, and rentable versus usable area.
3. Rent-free period and when it starts.
4. Tenant improvement allowance amount and payment schedule.
5. Caps on CAM and pass-through increases.
6. How rent increases or reviews are calculated, and any cap.
7. Deposit amount, form and return conditions.
8. Renewal options and how renewal rent is set.
9. Exclusivity for your core product or service.
10. Assignment and subletting rights.
11. Break clause dates, notice periods and conditions.
12. Limits on any personal guarantee.
13. Signage rights, including projecting and window signs.
14. Permitted hours and any required opening hours.
15. Responsibility for HVAC, roof and structural repairs.
16. Reinstatement obligations when you leave.
17. Notice and compensation for relocation or redevelopment.

This guide is general information, not legal, financial or real-estate advice. Read our editorial policy and disclaimer.