09/10/2026
Florida law often allows prejudgment interest on unpaid commercial invoices when the debt is liquidated and the due date can be fixed. A contract can make the claim stronger by setting the rate, the accrual trigger, and whether interest compounds. If the contract is silent, the creditor may still have a path to prejudgment interest under Florida’s loss theory, but the recovery will depend on proof of the amount due, the date of loss, and the applicable lawful rate.
Prejudgment interest is the recovery many creditors underbuild until the judgment is being prepared. By then, the timeline is fixed and the calculation has to be defensible. The unpaid invoice sits in aging for ninety days, then six months, then a year. The carrying cost, the opportunity cost, the cost of capital deployed and not returned: each becomes part of the collection posture if the claim is documented correctly.
Florida law permits prejudgment interest on unpaid commercial invoices only when the contract specifies a rate. Learn accrual rules, usury limits, and proof requirements.