A commercial lease is a binding commitment for the full term, not just for as long as it suits you. That does not mean you are stuck. It means an early exit needs to be arranged, not assumed.

What happens if you just stop paying and leave

This is the expensive path. Landlords generally have to make reasonable efforts to re-let the space rather than simply letting the loss build, but you can still end up liable for the rent for however long it takes to find a new tenant, plus the landlord's costs of doing so. Add legal fees on both sides and it is almost always more expensive than negotiating an exit properly.

The four real ways out

Selling the business almost always means assigning the lease. Landlord consent can take weeks, so start that process the moment a sale looks likely, not after contracts are exchanged with a settlement date already fixed.

Don't forget the incentive deed

If you received a rent-free period or a fitout contribution when you signed, the incentive deed almost certainly requires some or all of it to be repaid if you leave before an agreed date. This sits separately from the lease itself, and people are regularly caught out because they only checked the lease.

If you are the landlord

A tenant coming to you early is an opportunity, not just a problem. A negotiated surrender or a properly vetted assignment can get you a new tenant faster and with less disruption than fighting over an exit. The commercial question is usually what number makes the exit worth agreeing to, and how quickly you can re-let once it happens.

The short version

An early exit is manageable if you deal with it head on: work out which of the four paths fits your situation, check the incentive deed as well as the lease, and get the numbers agreed in writing before you act. Do that and an early exit is a negotiation, not a dispute.