Deposits, Progress Payments, and Getting Paid: Payment Terms for Trades

Unpaid invoices aren't a billing problem — they're a terms problem. Nearly every payment dispute traces back to something that wasn't written down before the work started. Here's how the trades that get paid on time actually structure their terms.

The deposit: how much, and what it's for

A deposit does two jobs: it funds early costs (materials, scheduling) and it filters clients. A customer who won't put down 10% was never going to be a smooth payer at 100%.

Common structures by job size:

• Small jobs (under ~$2,000): 50% up front or full payment on completion, same day.
• Mid-size jobs: 10–30% deposit, balance at completion or split at one milestone.
• Large projects: deposit plus milestone-based progress payments (below).

Know your local rules — several states cap home-improvement deposits (California, for instance, caps them at $1,000 or 10%, whichever is less). A deposit that violates state law isn't leverage; it's a liability.

Progress payments: tie money to milestones, never dates

Calendar-based payments ("50% on March 1") punish you for client-caused delays and decouple money from delivered value. Milestone-based payments fix both:

• 10% on signing
• 30% at rough-in / materials delivered
• 30% at substantial completion
• 30% at final walkthrough

One rule to hold sacred: never let unpaid work stack more than one milestone deep. If milestone two hasn't been paid, milestone three doesn't start. Enforcing that once, politely, early, sets the tone for the whole project — and clients respect a stated policy far more than an improvised complaint.

The final payment problem

The last payment is the hardest to collect, because your leverage just walked out the door with the finished work. Three protections:

1. Keep the final milestone meaningful but not huge — 20–30%. Big enough that the client pays it; small enough that if the worst happens, it doesn't sink you.
2. Define "done" in writing. Final payment is due "at final walkthrough," not "when the client feels finished." Punch-list items get listed, completed, and closed — they don't hold the whole payment hostage.
3. Warranty starts at final payment. A one-line clause — "workmanship warranty begins upon receipt of final payment" — gives late payers a reason to stop being late.

Late payment terms that actually work

Interest clauses ("1.5% monthly on overdue balances") are fine to include, but let's be honest: they mostly work as a signal, not a revenue stream. What actually moves late payers:

• Short, explicit due dates. "Due within 7 days of invoice" outperforms "Net 30" for residential work — homeowners aren't corporations with payment cycles.
• Card and digital payment options. Every step between "decided to pay" and "paid" loses days. A payment link in the invoice email collects faster than "mail a check."
• The pause clause. For ongoing work: "work pauses on balances 14+ days overdue." Enforced kindly and consistently, this alone eliminates most chronic lateness.

Put it all in the signed document

None of this works retroactively. Deposit, milestone schedule, definition of done, late terms — all of it belongs in the proposal or contract the client signs before work starts, when agreeing costs them nothing. The same terms, raised mid-project, sound like accusations.

Clients aren't offended by clear payment terms. The good ones are reassured — clear terms signal a professional operation — and the bad ones filter themselves out before they cost you anything. Both outcomes pay.