How Fire Protection Companies Get Paid Faster on Invoices

Fire protection companies invoice constantly and wait a long time to be paid. In ServiceTitan's 2026 Commercial State of the Trades survey of 1,020 commercial contractors, 82% send invoices within three days of finishing the work, yet 96% wait at least 15 days to get paid and 30% wait more than 30. Across the wider economy, Atradius found that 43% of the value of B2B sales in the United States was overdue in 2025. The billing side of a fire protection business is where that gap is won or lost.

This guide is about that billing reality: annual inspection contracts, deficiency repair quotes, service calls, property managers and general contractors who pay through AP portals, and customers with dozens of sites. It walks through why these invoices age, a step-by-step follow-up playbook, and what changed at OFS Group, an Ontario fire protection company. You can also read how OFS Group recovered $842,518 in four months in the full case study.

The short answer: fire protection companies get paid faster when every invoice leaves with the paperwork the payer needs, reaches the person who actually releases payment, and gets polite follow-up on a fixed schedule until a payment date is agreed. Most aging in this trade comes from missing paperwork and missing follow-up, not from customers who refuse to pay.

Why Do Fire Protection Invoices Age?

Fire protection invoices age because the work is ordered by one person, approved by a second and paid by a third. Every handoff between them is a place where an invoice can stall without anyone deciding not to pay it.

Inspection contracts bill in bursts

Annual and periodic inspection contracts tend to cluster. A busy inspection season produces hundreds of small invoices in a few weeks, all landing in customer AP queues at once. Each one is small enough to sit at the bottom of the pile, and together they are a large share of your cash.

Deficiency quotes wait on approval

An inspection finds a deficiency, your office sends a repair quote, and the quote waits for someone with budget authority. When the repair is finally done, the invoice often reaches a payer who never saw the quote. That is the most common source of "we did not approve this."

Service calls are ordered by the wrong person

A building superintendent calls about a trouble alarm or a leaking head, and your technician goes out the same day. The invoice goes to the superintendent's email, which is not where payables lives. Nobody disputes the work. The invoice simply has no owner on the customer side.

Property managers and GCs pay through portals

Large property management firms and general contractors increasingly require vendors to submit invoices through an AP portal, often with a purchase order number, a site code and attachments. An invoice emailed outside the portal can be treated as never received, even when someone opened it.

Multi-site customers split one relationship into many ledgers

A customer with forty buildings may have forty site contacts, several regional managers and one central AP team. Your records show one customer. Their records show forty cost centres. Matching those two views is where a lot of quiet aging happens.

What Does the Payer Need Before an Invoice Can Be Paid?

Most fire protection invoices that sit past 60 days are missing something the payer needs, not money. Before you build a follow-up schedule, make sure every invoice leaves your office with these details:

• The customer's purchase order or work order number, captured when the job is booked, not after.

• The site address and building name exactly as the customer refers to it, so a central AP team can route it.

• The signed inspection report or service ticket, attached rather than referenced.

• For deficiency repairs, the approved quote number and the name of the person who approved it.

• The correct billing entity, which for property managers is often the owner of the building rather than the management company.

• A note of whether the customer requires portal submission, and confirmation that it was submitted there.

This checklist does more for days sales outstanding than any reminder template. An invoice with the right PO and the signed report attached can usually be approved on the first touch. An invoice without them goes back into a queue, and the clock keeps running.

How Should a Fire Protection Follow-Up Schedule Work?

A good schedule starts before the due date and changes channel as the invoice ages. It is the same schedule for every invoice, so small inspection invoices get the same attention as a large retrofit bill. Here is a playbook that fits most fire protection ledgers:

Two rules make the schedule work. First, every touch is logged, so the next call starts where the last one ended. Second, any pushback on the work itself leaves the automated schedule immediately and goes to a person. For written templates you can adapt, see our past-due invoice email sequence.

What Should You Say on a Follow-Up Call?

A follow-up call on an inspection or service invoice should be short, specific and easy to say yes to. The goal is a payment date, or the reason there is not one yet.

A script that works on most calls:

• "Hi, this is Kate calling from your fire protection provider about the inspection invoice for the Elm Street building."

• "I want to confirm it reached your payables team and has everything you need, including the PO and the signed report."

• "Can you tell me when it is scheduled for payment?"

• "If anything is holding it up, I can send the missing document today."

Notice what the script does not do. It does not argue about the work, raise a late fee or threaten anything. Commercial customers buy inspections every year. The follow-up that keeps the contract is the one that makes paying easy.

How Do You Handle AP Portals and Multi-Site Customers?

Treat portal customers and multi-site customers as their own segment, because generic reminders do not reach them. A few practices help:

Keep a portal register

List every customer that requires portal submission, the portal name, the login owner on your team and the fields the portal demands. When an invoice is created for one of these customers, it is submitted in the portal the same day, and the follow-up asks about the portal status rather than resending a PDF. We cover the wider pattern in our guide to navigating big-company slow-pay systems.

Map sites to payers

For each multi-site customer, record who orders work at each site and who pays for it centrally. Follow-up goes to the payer, with the site named in the first line. The site contact is copied only when the payer says the work needs confirmation.

Bundle where the customer allows it

Some central AP teams prefer one statement covering every site over forty separate invoice emails. Ask. A monthly statement with each invoice, site and PO listed can turn forty follow-ups into one conversation.

What Changes When a Collections Team Has Three or More People?

Larger fire protection companies often have a team of three to five people working receivables, and the problem changes shape. The team is not short of skill. It is short of hours, so the largest balances get called every week and the long tail of inspection invoices gets called when someone has time.

When an AI agent such as Kate covers every account every week, the routine calls and reminders on that long tail run on schedule, and the people on the team spend their week on disputes, portal problems and key accounts. Coverage stops depending on who is out sick or how busy the season is. That is the pattern behind the result below, and the same one we describe for HVAC contractors with seasonal service volume.

What Did It Look Like at OFS Group?

OFS Group is an Ontario-based fire protection and commercial appliance service provider that has served commercial, industrial, hospitality and institutional clients since 1966. As the business grew and moved between internal systems, billing volume and complexity increased. Multiple service types, contract structures and payment terms meant invoices moved at different speeds, and more balances began to age than the team wanted.

Candace L., Financial Controller at OFS Group, described the goal this way: "We wanted to bring more structure to receivables as the business continued to grow, but it was important that any change still felt like us. Abivo understood that from the start."

Abivo deployed Kate to call customers about outstanding invoices using current balance, due date and history, hold the payment conversation, clarify disputes, and record promises to pay and next steps for the OFS team. Within four months of going live, OFS Group recovered $842,518 in overdue payments and cut DSO by more than 30 days, and the team went from four callers to one.

In Candace's words: "Kate (Abivo's AI) fit into our process naturally. Calls are handled in a steady, professional tone, and the details from each conversation are easy for our team to review. The impact on cash flow has been clear, and the process now runs quietly in the background, supporting the work our team is already doing." You can read the full OFS Group case study for the detail.

What Should You Measure After Changing Your Billing Process?

Measure the things your office controls, and check them monthly:

• Days from inspection or service call to invoice. Same-day invoicing is the cheapest improvement available.

• Share of invoices sent with a PO and the signed report attached.

• Share of inspection invoices past 60 days, tracked separately from large project bills.

• Promises kept: of the customers who gave a payment date, how many paid by it.

• DSO, calculated the same way every month. Our guide on how to calculate DSO shows the method and the levers that move it.

If you are comparing tools for this work, our page on collections software for fire protection companies covers what to look for, invoice type by invoice type. Fire protection also sits inside the wider construction, engineering and field services segment, where the same habits apply.

Practical Takeaways for Fire Protection Billing Teams

• Capture the PO and the payer at booking. Every missing field becomes a delay later.

• Attach the signed report or service ticket to every invoice, every time.

• Submit portal invoices in the portal the same day, and follow up on portal status.

• Run one follow-up schedule for every invoice, small inspections included.

• Hand any dispute about the work to a person immediately, with the report attached.

• Give your collections team its hours back for disputes and key accounts, and let consistent follow-up cover the rest.

Frequently Asked Questions

Why do fire protection companies wait so long to get paid?

Most delays come from routing, not refusal. Inspection and service invoices often reach the person who ordered the work instead of the person who pays, or arrive without the PO or signed report the payer needs. Follow-up that fixes those gaps gets most invoices paid.

When should a fire protection company follow up on an unpaid invoice?

Start before the due date. Confirm receipt within a week of sending, remind a few days before the due date, and call about a week after. Keep a steady weekly or biweekly rhythm until a payment date is agreed.

How do you get paid faster on deficiency repair invoices?

Reference the approved quote and the name of the approver on the invoice, and attach the inspection report that found the deficiency. If the customer disputes the repair, hand the account to a person with that paperwork rather than repeating reminders.

What is the best way to handle AP portals?

Keep a register of every customer that requires portal submission, submit each invoice in the portal the same day it is created, and ask about portal status in follow-up. An emailed PDF outside the portal is often treated as never received.

Does automated follow-up upset property managers?

Polite, accurate follow-up does not damage commercial relationships. Silence followed by a frustrated demand does. Good automated follow-up keeps the tone steady, logs every conversation and passes any friction to your team right away.

What results did OFS Group see?

OFS Group, an Ontario fire protection and commercial appliance service company, recovered $842,518 in overdue payments within four months of going live with Abivo, cut DSO by more than 30 days, and went from four callers to one.

If inspection and service invoices are aging while your team works the biggest balances, Kate can follow up on every account by phone, text and email from your accounting system. Get Started with Abivo.