GuideFeb 12, 2026
How to automate invoice reminders in Xero (2026 guide)
Step-by-step guide to setting up Xero's built-in reminders — and how to go beyond its limits with SMS, smart scheduling, and auto-stop.
Read articleYou did the work. You sent the invoice. Now you need to get paid. This guide gives you a proven 5-phase timeline for collecting outstanding invoices, from a gentle Day 1 SMS to small claims court.
No fluff, no vague advice. Just specific actions at every stage of unpaid invoice recovery, plus the strategies that actually move the needle.
“They keep trying to call these customers yet just keep getting the run around. They don’t understand that they make themselves look weak by being so passive.”
– Reddit user on r/smallbusiness
“I hate chasing payments. It’s awkward. I forget to follow up. I waste hours writing ‘just checking in’ emails.”
– Reddit user on r/Entrepreneur
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Before you can collect outstanding invoices effectively, you need to understand why they go unpaid in the first place. Knowing the root cause changes your approach entirely.
The most common reason by far. Your client is busy, the invoice got buried in their inbox, or it landed in spam. A single reminder usually resolves this. This is why automated SMS reminders with a 98% open rate are so effective -- they cut through the noise.
Your client wants to pay but does not have the money right now. This is especially common with small businesses and startups. Rather than ghosting them, offering a payment plan often recovers the full amount over time.
The client is unhappy with the deliverables or disagrees with the amount billed. They may be withholding payment as leverage instead of raising the issue directly. A quick conversation can often surface and resolve the dispute.
Larger companies often have convoluted approval processes. Your invoice may be sitting on the wrong desk, missing a PO number, or stuck in a multi-step approval chain. Finding the right contact in their AP department can unstick things immediately.
The hardest to deal with. Some clients never intended to pay, or they are deprioritizing your invoice because there are no consequences. This is where formal demands, late fees, and legal escalation become necessary.
Need a detailed playbook for non-paying clients? Read our step-by-step action plan for when a client is not paying.
A structured, time-based approach to unpaid invoice recovery. Start gentle, escalate steadily, and know exactly when to bring in third parties. Each phase includes specific actions you can take today.
Need ready-to-use message templates? See our unpaid invoice email templates and SMS payment reminder templates.
Most unpaid invoices are simply forgotten. Your first touchpoints should assume good faith and make it as easy as possible for the client to pay. Lead with SMS -- it has a 98% open rate compared to 20% for email.
A week has passed and you have not received payment or a response. The tone shifts from friendly to firm. This is where you increase frequency and add a phone call to the mix.
Three weeks without payment is no longer an oversight. This phase involves formal written notices and the application of late fees per your contract or invoice terms.
At this stage, you should consider whether a negotiated settlement or payment plan is better than no payment at all. This is your last attempt at direct resolution before involving third parties.
You have exhausted every reasonable direct effort. It is time to involve third parties. Your options include small claims court, a collections agency, or engaging an attorney.
Knowing when to act is half the battle. These five strategies are what separate founders who collect outstanding invoices from those who write them off.
Email gets buried. SMS gets read within 3 minutes on average. When you need to collect unpaid invoices, a short text message with the amount owed and a payment link is the single most effective first touchpoint. SMS open rates sit at 98% compared to roughly 20% for email. That alone makes it the best channel for Phase 1 reminders.
See our SMS payment reminder templatesEvery message you send -- SMS, email, formal notice -- should include a direct link to pay. Remove every possible obstacle between the client reading your message and completing the payment. If they have to go find the invoice, log into a portal, or call you for bank details, you are adding friction that kills collection rates.
If a client owes $5,000 and is struggling with cash flow, recovering $1,000 per month for five months is far better than recovering nothing. Proactively offering a payment plan in Phase 3 or 4 shows professionalism and often recovers the full amount. Put the agreement in writing with specific dates and amounts.
If your day-to-day contact is not responding, go up the chain. Find the business owner, CFO, or head of accounts payable. A polite message to a senior contact often gets immediate results because they do not want the embarrassment of an unresolved debt. LinkedIn, the company website, or a simple phone call to the main line can help you find the right person.
Every email, SMS, phone call, and letter should be logged with the date, time, and content. If you end up in small claims court or working with a collections agency, this paper trail is your evidence. It also protects you from disputes about what was communicated and when. A simple spreadsheet or your CRM is enough.
Frustration is natural when you are owed money. But crossing certain lines can destroy your legal standing, your reputation, or both. Avoid these at all costs.
Threatening to harm someone, damage property, or take actions you have no legal right to take is illegal in most jurisdictions. Stick to consequences you can actually follow through on: late fees, collections agencies, small claims court.
Sending 10 messages a day, calling repeatedly, or contacting the client at unreasonable hours can constitute harassment. Many jurisdictions have specific laws governing debt collection practices. Keep your communication professional and at reasonable intervals.
Naming and shaming a non-paying client on social media may feel satisfying, but it can expose you to defamation claims and makes you look unprofessional. Keep disputes private and handle them through proper channels.
If you are working on multiple projects for the same client, withholding deliverables on Project B because of non-payment on Project A can breach your contract. Each engagement should be treated separately unless your contract explicitly ties them together.
Not every unpaid invoice is worth chasing to the end. A clear-eyed cost-benefit analysis will save you time, money, and emotional energy.
| Factor | Continue pursuing | Consider writing off |
|---|---|---|
| Invoice amount | Over $1,000 | Under $500 |
| Days overdue | Under 90 days | Over 120 days |
| Client communication | Responsive but slow | Completely unresponsive |
| Documentation | Strong contract and paper trail | No contract, verbal agreement |
| Client solvency | Operating and solvent | Closed or bankrupt |
| Recovery cost | Under 30% of invoice value | Over 50% of invoice value |
Use our late payment interest calculator to see how much a late fee adds up to over time and factor that into your cost-benefit analysis. Also check our guide on late payment fee wording for invoices to make sure your terms are enforceable from the start.
The best collection strategy is prevention. These practices dramatically reduce the chance of having to collect outstanding invoices at all.
Specify the exact amount, due date, accepted payment methods, and consequences for late payment. Net 15 or Net 30 are standard. Ambiguity is the enemy of timely payment.
A 25-50% deposit upfront filters out bad-faith clients and gives you cash flow to begin. For large projects, use milestone-based billing: 50% upfront, 25% at midpoint, 25% on completion.
The longer you wait to send an invoice, the less urgency the client feels. Invoice the same day you deliver the work or complete the milestone. Speed signals professionalism.
A 1.5-2% monthly late fee creates urgency and compensates you for the cost of delayed payment. Make sure the fee is disclosed in your contract and printed on the invoice.
Check references, look at their online reviews, and start with a small paid project before committing to a large one. A client who pays a $500 invoice promptly is likely to pay a $5,000 one.
Do not wait for invoices to become overdue. Automated reminders that fire on the due date and escalate from there resolve most collection issues before they start.
Want more detail on setting payment terms? Our overdue invoice email templates include wording for every stage of the collection timeline.
The first three phases of the collection timeline (gentle reminders, persistent follow-up, and formal demands) are repetitive, time-consuming, and emotionally draining. They also resolve roughly 80% of all unpaid invoices.
ChaseBot connects to your Xero account and handles all of this automatically. It detects overdue invoices, sends SMS payment reminders and email reminders on a schedule you control, and escalates the tone over time, exactly like the phases outlined in this guide.
Multi-channel reminder sequences that fire automatically based on how many days overdue the invoice is. SMS first for maximum open rates, email for detailed follow-up.
Starts friendly and casual, then shifts to firm and formal. Each message in the sequence matches the urgency level of the corresponding phase -- no manual rewriting required.
The moment your client pays, all reminders stop automatically. No embarrassing follow-ups after payment. No manual checking. Everything stays in sync.
Instead of manually tracking overdue invoices and sending awkward follow-up messages one by one, you set up your reminder sequence once and let it run. You only step in personally for the 10-20% of cases that reach Phase 4 or 5. Learn more about how invoice reminder software works.
The longer you wait to collect unpaid invoices, the less likely you are to recover the money. This data should drive your urgency.
| Days overdue | Collection probability | Recommended phase |
|---|---|---|
| 1-7 days | ~95% | Phase 1: Gentle reminders |
| 7-21 days | ~90% | Phase 2: Persistent follow-up |
| 21-45 days | ~75% | Phase 3: Formal demands |
| 45-90 days | ~50% | Phase 4: Final notice + negotiation |
| 90+ days | <30% | Phase 5: Legal / collections |
The takeaway: act on Day 1. The first week is your highest-leverage window. After 90 days, your chances of collecting drop below 30%. This is exactly why automating the early phases matters so much because it ensures no invoice slips through the cracks during the critical first 45 days.
You now have the complete playbook for unpaid invoice recovery. ChaseBot handles phases 1 through 3 on autopilot with automated SMS and email reminders, escalating tone, and real-time sync with Xero. You only step in when it matters.
Try ChaseBot freeStep-by-step guide to setting up Xero's built-in reminders — and how to go beyond its limits with SMS, smart scheduling, and auto-stop.
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