How do I get customers to pay the final invoice on an install without chasing them for weeks?
Short answer
Collect a deposit up front, get final payment due at completion in writing before you start, and don't leave the job site until the final payment is handled.
Most chasing happens because payment terms weren't locked in before the work started
If 'pay when it's done' is the only agreement you have, you're negotiating payment terms after you've already delivered the value, which is the weakest possible position. The fix happens at the proposal stage: deposit due to schedule the job, balance due on completion, in writing, signed before a truck rolls.
Balance due on completion should mean completion, not 'sometime after.' Build the collection into the last step of the job itself, the same way you'd collect at a restaurant before the table clears, not by mailing an invoice and hoping.
Make the final step of the job the payment step
Train the lead installer or the office to treat collecting final payment as the literal last task on the checklist, before the crew leaves the driveway. Walking the customer through the completed work and handling payment in the same conversation removes the awkward gap where the job feels 'done enough' to the customer even though the invoice isn't settled.
Collecting at job completion
You
“Everything's installed and tested, system's running great, I want to walk you through it real quick. After that, I'll need to collect the remaining balance of $6,300 before we head out, same as what was on the proposal you signed. Card or check work best for you?”
Customer
“Can I just mail a check next week?”
You
“I appreciate that, but our terms are payment on completion, it's on the signed proposal. I can run a card right now or take a check today, whichever's easier.”
Do not say
- “Don't say 'no rush, whenever works' at completion, it converts a same-day collection into a 30-day chase.”
Payment terms line for the proposal
Payment terms: A deposit of 30% is due to schedule this installation. The remaining balance is due in full upon completion of the work, before the crew leaves the site, payable by card, check, or approved financing. Work will not begin without the deposit on file. If special order equipment is required, an additional material deposit may apply.
Where owners get this wrong
- Starting install work without a signed deposit and written final-payment terms.
- Letting the crew leave the site before payment is settled 'to be nice.'
- Sending the final invoice by mail or email days after completion instead of collecting on-site.
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