How long do I have to sue over a broken contract?
In Texas, usually 4 years from the breach (Civil Practice and Remedies Code section 16.004 and 16.051). In Florida, usually 5 years for a written contract (section 95.11(2)(b)) and 4 years for one that is not written (section 95.11(3)(j)). The contract itself can affect this, so read it early.
This is general information, not legal advice. Your deadline depends on your facts.