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Commercial Rent Reviews: What Is Fair?

The lease decides how the rent changes.

Commercial Rent Reviews: What Is Fair? Commercial Property & Office Space

Updated October 2026 · Fraser Bond

Commercial · Rent reviews

Commercial rent reviews

Openmarket
Indexlinked
Upwardonly?
Expertor arbitrator
In short: Commercial rents usually change only as the lease allows, typically at rent reviews every three to five years. Reviews may be to open market rent, linked to an index such as RPI or CPI (often with caps and collars), or fixed increases. Many leases are upward-only. For open market reviews, the lease sets assumptions and disregards, such as ignoring tenant improvements. If you can't agree, the lease will say whether an independent expert or arbitrator decides. Get a surveyor's view of market rent before negotiating.

Frequently asked questions

Can commercial rent go down at review?

Not if the lease is upward-only.

Who decides disputes?

An expert or arbitrator, per the lease.

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