Which lease clauses most often hurt restaurant operators?

The ones people skim: rent escalations over the term, the length of the rent-free fit-out period, the service and chiller charges on top of base rent, the make-good or restoration obligation at the end, break-clause terms, and any personal liability you take on. None is exotic, but together they decide the true cost and risk of the lease — and they are far cheaper to negotiate before signing than to discover after.

From Restaurant Lease and Fit-Out: The Traps That Sink Operators — the full reading, with the method behind this answer.