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Lease Extension

A lease extension lengthens a tenant's right to use an asset beyond the current lease period. It may be exercised under an option already in the agreement or negotiated later with the landlord or lessor. Rent, duration, guarantees and other terms may stay the same or change.

From the Money Master HQ dictionary, founded by Shihan Sheriff (FCMA, VP of Finance at Nomod, CFO at Esanjo Ventures). How these definitions are written.

What it means

A business may extend a shop, office, warehouse or equipment lease to avoid moving or replacing an asset, and a landlord may prefer a reliable tenant to a vacant property. But an extension should be a new business decision, not an automatic response to an expiry reminder.

Compare the value of staying with alternative space or equipment, future demand and the cost of change, since a low first-year rent may be offset by later increases or a long commitment. Read the existing contract early to see whether there is an extension option, who may exercise it, by what deadline, and whether it sets rent, a formula or a process for agreeing it.

Check for conditions such as no default, because an option is different from a landlord's general willingness to negotiate. Keep proof that the notice was delivered in the manner the contract requires, and do not assume a casual email fulfils a formal notice clause.

Map the whole proposed arrangement, checking base rent, service charges, maintenance, fit-out rights, repair obligations, permitted use, subletting, guarantees and exit provisions. Record whether existing deposits carry forward and what happens to improvements at the new end date.

Ask about access during renovation and who bears downtime, and for a machine, service and replacement provisions can be as important as the lease payment. Calculate the financial effect using cash flows, not just headline rent, because moving has upfront costs, lost trading time and possible customer disruption while staying may require refurbishment or a higher recurring payment.

Model the full period and a weaker-demand scenario, and bring key dates into a decision calendar well before the deadline. Accounting may change when the legal term changes.

Under IFRS 16, extension options are considered in determining a lessee's lease term when the lessee is reasonably certain to exercise them, and changes in circumstances or contract modifications can require reassessment or remeasurement. The precise treatment depends on the arrangement and reporting standard, so finance should review the signed terms with the accountant.

Close the loop operationally by getting an authorised signed agreement, updating rent schedules and any registration or approval required locally, notifying the facilities and insurance teams, and retaining the document. If the extension is not agreed, prepare a realistic exit plan.

In practice

Real-world examples.

1

Example

A cafe uses a written option to add three years to its shop lease before the notice deadline. It sends the notice by the method the contract names and keeps proof of delivery.

2

Example

A warehouse tenant compares increased rent with moving costs and access to customers. It builds a cash-flow comparison for the whole extension period before replying to the landlord.

3

Example

A company extends a leased machine's term and asks finance to reassess the accounting treatment. Finance reviews the signed amendment, updates the payment schedule and records the changed lease term.

Formula

Calculation

Illustrative incremental stay cost = Extension-period rent and charges + Required improvement costs - Costs avoided by not moving Worked example. An invented business considers a one-year extension costing $180,000 rent and charges and $20,000 refurbishment. Moving now would cost $65,000 in relocation and setup that the extension avoids. - Illustrative incremental stay cost is $180,000 + $20,000 - $65,000 = $135,000. - This does not yet compare the rent of alternative premises or the value of operational disruption. To compare fully, suppose alternative premises would cost $150,000 for the year and the business estimates $15,000 of lost trading during the move. - Cost of staying = $180,000 + $20,000 = $200,000. - Cost of moving = $150,000 + $65,000 + $15,000 = $230,000. - Staying is cheaper by $230,000 - $200,000 = $30,000 in this scenario. This is a cash decision aid, not the accounting value of a lease liability.

Case study

Seen in the real world.

This illustrative and entirely fictional example follows Bay Pharmacy, an invented retailer whose lease expired in nine months. The owner assumed a friendly landlord would renew on the old terms. Finance found an option that required written notice six months before expiry and allowed a rent review. The team checked its sales forecast, alternative locations and moving costs. It obtained a market rent assessment and sent a compliant notice before the deadline.

After negotiating charges and refurbishment access, authorised signatories executed the extension. Finance reviewed the changed lease term and payment schedule; operations updated insurance and supplier addresses only where needed. The owner kept a viable location without relying on a handshake. The early review also preserved a credible option to move if the final terms had been uneconomic.

Watch out

Common mistakes.

  • Missing a contractual option deadline while assuming informal talks secured an extension.
  • Comparing rent alone while ignoring charges, fit-out, moving costs and flexibility.
  • Failing to update finance, insurance and operational records after signing.

Questions

People also ask.

Is an extension option the same as a new agreement?

No. An existing option follows its contractual conditions; a later negotiation may require a new written agreement.

Does an extension always change lease accounting?

It may. Review the actual terms and applicable reporting standard with finance.

When should a tenant begin planning?

Well before notice deadlines, leaving time to compare alternatives and negotiate.

Was this explanation helpful?

From the founder's library

Accounting Fundamentals: A Non-Finance Manager's Guide to Finance and Accounting, by Shihan Sheriff

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Last updated · October 8, 2026
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Disclaimer

The information provided in this finance dictionary is for educational and informational purposes only. It should not be construed as financial, investment, legal, or tax advice. Always consult with a qualified professional before making any financial decisions. Money Master HQ makes no representations or warranties about the accuracy, completeness, or suitability of this information. Use of this content is at your own risk.