Best practice guide

How to collect unpaid invoices without damaging relationships

Late payments quietly drain even healthy businesses. With a consistent, automated follow-up process, collecting overdue invoices becomes something your customers respect, and you skip the awkward phone calls. Below are five strategies that get you paid and protect the relationship.

£22,000
Average owed to a UK small business in late payments
UK Dept for Business & Trade, 2023
50%
Of outstanding invoices, by value, are paid late
UK Dept for Business & Trade, 2023
73%
Report better customer relationships after automating AR
Paidnice customer survey, 2025
The psychology

Why we put off collecting

Most finance teams and owners delay following up on late payments for the same few reasons.

33%Fear of damaging the relationship
29%Feel the lateness is not significant enough
17%Prefer informal follow-ups
7%The admin burden
The fear is real, and usually overstated. Most late payments come from a customer's own cash flow or admin problems, not from anything you sent. A professional, consistent follow-up process rarely damages a relationship. Inconsistency and last-minute panic do. Source: Intrum European Payment Report, 2023
The automation advantage

Let the system do the asking

When reminders and late fees come from an automated system instead of you, the dynamic changes. You are no longer the person asking for money. The process is, and it treats every customer the same way.

  • The reminder is the system doing its job, not you asking for a favour.
  • Every customer gets the same professional treatment, which builds trust.
  • Awkward conversations are replaced with a predictable schedule.
  • It can flip the dynamic. Customers start calling you.
"After we implemented Paidnice, we pretty much found the opposite. The client starts phoning us and saying, 'Listen, why are you invoicing me for late payments?'" Roman Tepes, Balance My Books
The framework

Five strategies for collecting unpaid invoices

They work together. Set the expectation early, respond in stages, automate the routine, frame fees as policy, and keep a path to resolution.

1

Set clear expectations from day one

Your payment relationship starts long before the first invoice. Build it during onboarding and contract negotiation.

  • Put payment terms in every contract and quote.
  • Walk new customers through how and when you invoice.
  • State what happens if payment is late, up front: late fees, paused service.
  • Offer a few easy ways to pay: bank transfer, card, direct debit.
2

Respond in stages, not all at once

Not every late invoice needs the same response. Escalate gently as the days add up.

Days 1 to 7
A friendly automated email reminder. Automate reminders →
Days 8 to 14
A firmer reminder by email and SMS. Automate SMS →
Days 15 to 30
A late fee applied automatically, with notice. Automate late fees →
Day 31 onward
A phone call and a possible pause on service. Automate escalations →
3

Automate the routine, personalise the exception

Use automation for the volume, and save your time for the accounts that need it.

  • Automate standard reminders for every account.
  • Personalise the message for key customers or unusual situations.
  • Use templates that still pull in the real invoice details.
  • Schedule reminders for business hours, when they actually get read.
4

Frame late fees as policy, not punishment

How you talk about a late fee decides how it lands.

  • Apply the same late fee policy to every account.
  • Explain the reason: it keeps your service reliable for everyone.
  • Use plain, matter-of-fact wording, not loaded language.
  • Make clear the system applies fees by date, automatically.
5

Keep a path to resolution

When an invoice stays unpaid despite the reminders, give the customer a way through.

  • Have a simple script for harder conversations, focused on solutions.
  • Offer a payment plan when a customer is genuinely struggling.
  • Consider an early payment discount alongside the fee.
  • Keep a record of every reminder in case you need it later.
Free download

The unpaid invoices checklist

A step-by-step checklist to put all five strategies in place. It covers your foundations, your communication, your automation, relationship management, and when to escalate.

Free, no email required. Yours to keep.

Inside the checklist
  • Foundation setting
  • Communication strategy
  • Automation setup
  • Relationship management
  • Escalation framework
Download the checklist (PDF)
See it in action

Close the gap between invoice and payment

Paidnice is award-winning accounts receivable automation for finance teams on Xero and QuickBooks. It applies your late fees, sends your reminders, and follows your rules, so overdue invoices get collected without the awkward conversations. Most customers cut their days sales outstanding by up to 50% in the first 30 days.

  • A walkthrough of the features that fit your industry
  • Setup guidance based on your business size
  • An ROI estimate based on your current AR
Book a free demo →
Denym from the Paidnice support team