Plumbing

How plumbing companies chase unpaid invoices without awkward calls

Updated October 3, 2026 · Alvin

Plumbing invoices go unpaid for the most boring reasons: the bill sat in an inbox, it went to the wrong person, or the office felt awkward asking twice. Automatic invoice follow-up sends a polite sequence — around day 7, 14, and 30 — with a payment link in every message. Alvin runs it from your QuickBooks aging and escalates large balances to the owner.

Why invoices drift

Almost nobody withholds payment out of spite. The usual story is duller: the invoice went to the homeowner's email but the spouse handles the bills, the property manager needs an approval they forgot to request, or the office meant to follow up and the week got away from them. Net-terms work drifts by default. Without a system, "we'll pay you next week" quietly becomes sixty days.

The awkwardness is the real blocker. Nobody in the office enjoys calling a customer about money, so the follow-up happens late, apologetically, or not at all. An automated sequence removes the emotion from it entirely. A text reminder isn't awkward — it's just a reminder. The customer usually pays and sometimes even thanks you.

The 7/14/30 sequence

1. Day 7 — the friendly reminder. A short text: invoice number, amount, what the work was, payment link. Tone is "in case this slipped through," because usually it did.
2. Day 14 — the firmer nudge. Same facts, slightly more direct. Mention the due date that has passed. The payment link goes in again — friction is the enemy, so paying should take under a minute.
3. Day 21 — the check-in. Ask if there's an issue with the invoice. This is where genuine disputes surface — wrong amount, work questioned, sent to the wrong contact — and where you want a human looped in, not another automated text.
4. Day 30 — the escalation. The sequence stops and the owner gets a summary: balance, age, full message history, job record. Thirty-day money is an owner conversation, not a text-message conversation.

Every message carries the payment link. That detail matters more than the wording: a customer who has to call the office, find the invoice, and read a card number over the phone will do it "tomorrow." A customer who taps a link pays now.

Work from the books, not from memory

The sequence only works if it runs from real balances. Alvin reads the aging report from QuickBooks, so paid invoices never get a reminder — the fastest way to destroy trust is to chase money a customer already sent. When a payment posts, the sequence closes. When a customer replies, it pauses. The office never maintains a spreadsheet of who owes what, because the books are the list.

Large balances get special handling. You set the threshold — say, anything over a few thousand — and those invoices escalate to the owner earlier, with the full context attached. Big commercial balances and property-manager accounts usually need a relationship conversation, not a text sequence, and Alvin knows the difference.

What Alvin handles vs. what stays with you

The line is simple: Alvin collects the easy money and documents everything; you handle the conversations that need judgment. Alvin never threatens, never adds fees, never negotiates — anything past a polite reminder is a human's job.

The rules that keep it polite

• Paid means done. The moment payment posts, the sequence closes. Chasing paid invoices is the one unforgivable error — the books are checked before every send.
• Reply means pause. Any customer reply stops the sequence. A dispute, a question, even an "I'll pay Friday" — a human sees it before another message goes out.
• Keep the tone boring. Facts, amount, link. No lectures about cash flow, no passive aggression, no legal language in a text message.
• One channel at a time. Text first, email as backup. Never both at once.
• Document everything. Every reminder, every reply, every payment lands on the invoice record — so a dispute in month three starts with a complete paper trail, not a memory.

Cash flow is the thread that connects the whole operation: answering every lead fast fills the schedule, and following up every invoice makes sure the work actually turns into money.

What it costs to keep chasing by hand

For example, a shop with a few hundred thousand in annual revenue and typical net-terms drift can easily carry a month of receivables past due at any given time — money that was earned, taxed in the owner's mind as income, and sitting in someone else's account. The office manager's Friday-afternoon call list recovers some of it and burns goodwill on the rest. A sequence that sends itself, stops on payment, and escalates the hard cases collects the same money without the awkward calls — and without the invoices that simply get forgotten.