Rent Review Clause: Market, CPI, and Fixed Options Explained

When you sign a commercial lease the rent review clause decides how and when your rent can go up. It is one of the most important parts of the agreement because it affects your costs for years. Small business owners often sign leases without noticing how the review works until the first increase arrives. This article breaks down the three common types: market review, CPI linked review, and fixed increase. We show real wording you might see and what to ask the other side to keep costs predictable.

Key takeaways

• A rent review clause sets the method and timing for rent changes during your lease term.
• The three main types are market review, CPI linked review, and fixed increase. Each carries different risk and predictability.
• Vague wording or one sided terms can lead to large, unexpected jumps in rent.
• Ask for caps, clear index sources, and written examples before you sign.
• Tools like AxiomRisk can surface risky sentences and give you plain language notes on what to ask.

What is a rent review clause in a commercial lease?

A rent review clause is a section in your lease that sets out how the rent will be checked and possibly changed during the term. It usually applies every few years. The clause will say who decides the new rent, what method is used, and what happens if you disagree. If the clause is vague or one sided you could face a large jump in rent with little warning. Knowing the differences helps you spot risky wording early.

How does a market rent review work?

Market review ties the rent to what similar properties are charging in the area at the time of review. The lease will often say the rent shall be the open market rent for the premises as determined by an independent valuer. An example of risky wording is: "the rent shall be reviewed to the current market rent for comparable premises in the locality." This gives the landlord broad discretion.

Questions to ask for a market review

• Who picks the valuer and what qualifications must they have?
• What qualifies as a comparable property?
• Can you get a second opinion if you disagree with the valuation?
• Is there a cap on how much the rent can increase in one review even if the market says otherwise?

How does a CPI linked rent review work?

CPI linked review uses an inflation index such as the consumer price index to adjust the rent. The clause might read: "the rent shall be increased by the percentage change in the CPI for the preceding twelve months." This seems objective but watch for wording like: "the rent shall be increased by the CPI or any other index the landlord chooses." That gives the landlord power to switch to a higher index later.

Questions to ask for a CPI review

• Is the index source fixed, such as the national CPI published by the government statistics office?
• Is there a floor or ceiling so the rent does not go below zero or rise above a set percentage in a year?
• Does the adjustment apply to base rent only or also to service charges and outgoings?

How does a fixed rent increase work?

Fixed increase review sets a pre agreed rise such as five percent per year or a set amount every two years. An example is: "the rent shall increase by five percent compounded annually on each anniversary of the commencement date." This is predictable but can still be high if the rate is locked in for a long term.

Questions to ask for a fixed increase

• Is the percentage simple or compounded?
• Does it apply only to the base rent or also to service charges?
• Is there a review point where you can switch to market or CPI if the fixed rate becomes unfair?

Comparing the three rent review types

Each type has trade offs. Market review can keep rent fair with the area but leaves you exposed to sudden jumps if the area becomes popular. CPI linked review follows inflation but can lag behind real market rents or over adjust if inflation spikes. Fixed review gives certainty but may leave you paying above market if the economy slows. Think about your business plan. If you expect to stay five years or less a fixed or CPI clause may be safer. If you plan to stay longer a market review with caps and clear rules may protect you better.

Watch for combined methods and upward only traps

Some leases combine methods in confusing ways. A clause might say: "the rent shall be the greater of the market rent or the CPI adjusted rent." This means you get the higher of two increases which can compound quickly. Ask for the lesser of the two or a hybrid that uses one method with a cap. Also look for upward only language that says the rent will never go down even if market rents or CPI fall. That is common but you can ask for a two way review or at least a freeze if the index goes negative. Check the rules where you are for any restrictions on upward only clauses.

Silent or vague rent review clauses

Another risk is silent clauses that do not state a method at all. If the lease only says the rent will be reviewed periodically without saying how, you may be left to negotiate from a weak position later. Push for a clear method to be written in before you sign. If the landlord refuses, consider whether the space is worth the uncertainty.

Get a written example before you sign

Before you sign ask for a written example of how the rent would change under the clause over the next three years using realistic numbers. For instance, if base rent is 50,000 per year and the clause says five percent compounded annually, year two is 52,500, year three is 55,125, year four is 57,881. This shows the real impact and helps you compare options. If the landlord will not provide one that is a warning sign.

AxiomRisk can help you find risky sentences in your lease and explain what each one means. You upload your contract and get the exact wording quoted back with plain language notes on why it matters and what to ask. For a deeper look at other lease risks see Commercial Lease Lock-In Clauses: Spot Rent Hikes and Exit Traps and Commercial Lease Personal Guarantee: How to Cap, Limit, or Trade It.

Next step

Take a few minutes to review your lease now. Look for the rent review section and see which type it uses. Note any vague or one sided wording. Then decide what you want to ask for before you sign or renew. When you are ready you can check your contract free.