Can an expired contract be renewed?

Technically an expired contract can't be 'renewed': renewal extends a live agreement, and once it expires there's nothing live to extend. What actually happens is one of three things: the parties sign a new contract (often on the old terms, sometimes called a reinstatement); they sign a retroactive extension papering over the gap; or they just keep performing, creating an implied contract on roughly the old terms, the riskiest option, because key protections may not carry over and either side can walk away.

The gap period is the real hazard: work done between expiry and re-signing may sit outside liability caps, insurance requirements and agreed pricing.

If you're in this spot, get a new agreement signed quickly and date-stamp the gap. Then fix the upstream cause: contract end dates need reminders with enough lead time to renew before expiry, not after.