Every field service business has the same drawer. It holds the invoices that went out after the job was done, the customer was happy, and then nothing happened. Thirty days turns into sixty, the office means to call, and by the time somebody does, the customer has moved on to the next contractor. Collecting past-due invoices isn't about being tougher on the phone. It's about knowing which account to call first, what to say, and making sure nobody drops the follow-up. This playbook walks through the process step by step, with the email wording you can use today.
Why the Age of an Invoice Matters More Than the Size
The instinct is to chase the biggest balance first. The math says otherwise. A Commercial Collection Agency Association survey found that an invoice loses more than 10% of its collectability by 30 days past due and about 18.7% by 60 days. By 90 days, your odds of ever collecting are down by nearly a third, and by six months it's close to a coin flip.
That changes who you call first. A $10,000 balance that is 15 days late is annoying but safe; the customer is probably just slow. A $4,000 balance that is 200 days late is money you are about to lose for good. The old money comes first, even when it's the smaller number.
Step 1: Run an Aging Report Every Week
An accounts receivable aging report sorts every open invoice into buckets by how late it is: current, 1–30 days, 31–60, 61–90, 91–120, and 120+. Run it every week on the same day, and look at three things:
- How the buckets are moving. If the 61–90 bucket is growing week over week, invoices are sliding past the point where a friendly reminder works.
- Which customers show up in the older buckets more than once. One late invoice is a hiccup. Three is a pattern.
- Total past due as a share of total receivables. This is the one number to watch over time. If it creeps up, the process is slipping somewhere.
The report tells you where the problem is. It doesn't tell anyone what to do about it, which is where most shops get stuck.
Step 2: Rank Accounts by Risk, Not Alphabet or Balance
Turn the aging report into a call list. The simplest way is to weight every dollar by how old it is, so a dollar at 120 days counts for far more than a dollar at 15. Add it up per customer and sort. The account at the top of the list is the one most at risk, and that's the first call of the day.
This also fixes the quiet problem in most offices: the easy calls get made and the uncomfortable ones don't. A ranked list removes the choice.
Step 3: Split the Work Into Queues
Not every past-due account needs the same action. Group them so the person working collections knows exactly what each account needs today:
- Newly past due. A polite reminder, usually by email.
- Promises due today. The customer said they'd pay today. Check whether they did.
- Broken promises. The date passed and no payment arrived. These get a phone call, not another email.
- Disputes. The customer is not paying because of a problem with the job or the bill. Route these to whoever can fix the problem, because no amount of reminding will collect them.
- Over credit limit. Customers who owe more than you're comfortable with. Flag them before the next job gets scheduled.
- 90+ days. Final notices and decisions about outside collections.
Step 4: Escalate the Tone on a Schedule
Most late payers aren't refusing to pay. They lost the email, the invoice is sitting on someone else's desk, or they're waiting to be asked. Start friendly and get firmer on a set schedule, so the tone is never a judgment call made on a bad day. Every message should include the invoice number, the job, the amount, how many days late it is, and how to pay.
Friendly reminder (1–15 days past due):
Hi Dana, just a quick reminder that invoice #4471 for the furnace repair on March 3 ($1,240) was due on April 2. If it's already on its way, thank you! If not, you can pay online here: [link]. Let me know if you have any questions about the bill.
Firm follow-up (30–45 days past due):
Hi Dana, invoice #4471 ($1,240) is now 34 days past due, and we haven't heard back on our earlier reminder. Please send payment by Friday, or reply with a date that works so we can note it on your account. You can pay here: [link].
Final notice (60+ days past due):
Dana, invoice #4471 ($1,240) is now 65 days past due. We need payment or a payment plan in place by May 20. After that date, we'll have to pause future service on your account and move the balance to our collections process. We'd much rather sort this out directly — please call me at [number].
Only write consequences you will actually follow through on. A final notice that isn't final teaches customers to wait for the next one.
Step 5: Log Every Promise and Follow Up the Day It's Due
"I'll send it Friday" is the most common thing a late payer says, and the most commonly forgotten on both sides. Write down every promise to pay with the amount and the date, and check it that day. A promise that is followed up the morning after it breaks usually gets paid. One that is noticed three weeks later usually doesn't.
The same goes for every other touch: calls, emails, disputes, payment plans. Note who made the contact and when. When the owner asks "what's going on with this account?", the answer should take ten seconds to find, not a round of asking everybody in the office.
Step 6: Check Payment History Before the Next Job
The best time to deal with a slow payer is before you send another truck. Track each customer's average days to pay, measured from the invoice date to the day the payment clears, and set a credit limit for your commercial accounts. When a customer who averages 70 days to pay calls for a big job, that's the moment to ask for a deposit or tighter terms, not after the work is done.
When to Hand an Account to an Outside Agency
At some point a balance costs more to chase than it's worth. Most shops set a rule, such as 90 or 120 days with no response to a final notice, and then hand the account to a collection agency or small-claims court. Agencies usually keep a percentage of whatever they recover, so the earlier steps in this playbook are almost always the cheaper way to get paid. Collection rules vary by state, especially for residential customers, so check with your attorney before you write your final-notice language or send an account out.
The Cheapest Collection Is the One You Never Need
The fastest way to shrink your past-due list is to invoice and take payment at the job. A tech who can hand over the invoice and run the card on-site closes out most residential work before the truck leaves the driveway. We cover that side in how to avoid collections with mobile invoice software, and for recurring customers, billing and collecting from lawn care customers applies to any route-based trade.
Running Collections Without the Spreadsheet
Every step above works on paper. It just takes a lot of it: an aging report exported every week, a call list sorted by hand, promises on sticky notes, and emails typed one at a time. That's the job Collection Management in Smart Service Cloud is built to do:
- Aging at a glance. Every open dollar, bucketed by age, on one screen.
- A ranked work list. Accounts sorted by collection priority, weighted by the age of every dollar, so the office always knows who to call first.
- Seven work queues. Accounts grouped by what they need today, from new past-dues to broken promises.
- Promises, disputes, and payment plans in two clicks. Every touch stamped with who did it and when, and a broken promise flagged the day it breaks.
- Collection emails that write themselves. Pick friendly reminder, firm follow-up, or final notice, and every invoice, balance, and day count is filled in.
- Credit limits and average days to pay. Know who actually pays before the next job is scheduled.
See It on Your Own Invoices
If your past-due list lives in a spreadsheet, a stack of printouts, or someone's memory, request a demo of Collection Management and we'll walk through a real collections work queue with you: the aging strip, the queues, promises, and the emails. Smart Service integrates with QuickBooks and keeps your office and techs in sync through the Cloud mobile app.
