What can I do about a client who's six months late on an invoice?

[Luke.C]

I’m trying to figure out how to handle a client who’s now almost six months late on a pretty large invoice, and it’s starting to really impact my cash flow. I sent a formal demand letter last month, but I’m not sure what the reasonable next steps are or if I should just keep waiting. I’ve never had to push things this far before.

[EthanS]

That invoice is a drain on your cash flow. Start by confirming the exact terms and the amount due. Put a firm deadline in writing and remind them of any late fees if your contract allows it. Gather emails and the signed agreement to keep a clear paper trail. If they push back offer a payment plan with realistic milestones. If there is no movement after the deadline consider a formal collection step or bring in a specialist. The aim is to secure a clear payment schedule without wrecking the relationship.

[Addison89]

Take a step back and model the impact of this six month delay on your numbers. If the cost of chasing it up is lower than the amount at stake then push ahead while keeping a professional tone. Review the contract for any late payment remedies or interest terms and apply them if allowed. A clear payment plan can buy you time while protecting some of your revenue. Consider whether to pause non essential services until the invoice is paid.

[Olivia.P]

Chasing this six month old invoice can feel like a trap you keep stepping into. You might be right that pushing harder risks wrecking the client relation for a small gain. Still you need a plan and some firmness. If the client is avoiding payment maybe the problem is not you but their cash flow and priorities. In the end you may decide to stop service until payment is made.

[VioletIL]

Maybe frame this as a learning about how you set expectations for future work rather than a solo battle over cash. Use the experience to tighten terms for new clients such as upfront deposits or staged deliverables. If you have a payment at risk policy add it to your standard process. This shifts the focus from chasing one invoice to building a more reliable workflow.

[Amelia98]

Invoice six months late feels rough. I would call them and ask for a quick update then decide next moves.

[EleanorPG]

Think about how the demand letter reads and what your reader expects in a business letter. Focus on clarity a specific due date and the consequences while keeping a calm tone. You want the message to be actionable and not a rant. A short direct note can work as a bridge to a real conversation.

[Mia32]

This is not just about one invoice it touches on risk management and your willingness to enforce terms. Some teams tolerate late payment as a cost of doing business some push hard from the start. Either way the choice reflects your policy and your own tolerance for friction.