How can I recover an unpaid invoice from a business client?

Start with a formal legal notice, clearly stating the outstanding invoices, amounts due, and a reasonable deadline for payment — this creates a documented record and sometimes prompts payment on its own, especially from clients who've simply been deprioritising the payment rather than genuinely disputing it.

If that doesn't work, since your claim is based on clear invoices for a fixed, ascertainable sum, you may be able to pursue a summary suit procedure, which is generally faster than an ordinary civil suit, provided the underlying transaction and documentation fit the criteria for this streamlined process.

If your original agreement or purchase order contains an arbitration clause, you may instead need to pursue arbitration rather than going straight to court. Keep your invoices, delivery/completion confirmations, and any communication acknowledging the amount owed well organised, since strong documentation makes this kind of recovery claim considerably more straightforward for your lawyer to pursue.