# How to chase overdue invoices as a bookkeeper (3 ways compared)

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For AI agents: [Markdown version of this page](https://aiagentskills.biz/md/how-to/bookkeepers/invoice-follow-ups.md) · [llms.txt](https://aiagentskills.biz/llms.txt) Guide · 3 ways compared

# How to chase overdue invoices as a bookkeeper

There are three honest ways to chase overdue invoices: manually (about an hour a week, plus the awkwardness), with DIY AI prompting, or with a $19 ready-made agent. This guide compares all three with real pros and cons.

It tracks open invoices and prepares reminder drafts: customer, invoice, amount due, days overdue, reminder draft and approval status. Chasing takes minutes. Here are the three honest ways to get it done, with real trade-offs.

[Compare the 3 ways](#compare)[Skip to the ready-made agent](#way3) [Home](/) › [How-to guides](/how-to/) › Invoice Follow Ups

## Way 1: without AI (the manual way)

**Honest cost: an hour a week, plus the awkwardness.**

1.  Check what is open, how overdue, and what was said last.
2.  Draft reminders that are firm but do not burn the relationship.
3.  Track who was reminded when, so nobody gets two in a week.

Chasing overdue invoices is the job everyone postpones: checking what is due, how overdue, drafting a reminder that is firm but not rude, then forgetting to send it.

### Pros of doing it manually

  - Free except your time - no tools, no accounts.
  - You learn the job deeply and control every detail.
  - No data leaves your hands.

### Cons of doing it manually

  - an hour a week, plus the awkwardness - every single time the job runs.
  - Quality depends on your energy that day.
  - More volume just means more hours; it does not scale.

## Way 2: with AI, but without AI Agent Skills (DIY prompting)

A chat assistant genuinely helps here. The catch is that you become the workflow designer. What you have to figure out yourself:

  - You must paste the invoice list and reminder history each run.
  - You must set tone rules explicitly, or drafts swing between rude and toothless.
  - You must control sending - an automated chaser without judgment burns clients.

Here is a starter prompt that works - copy it and bring the inputs listed:

    Here are my open invoices: [paste customer, invoice, amount, due date]. For each one past due, draft a payment reminder - firm but polite, mentioning invoice number, amount and days overdue. Approval status column at the end. Do not send anything.

More on this prompt: [the free invoice follow-ups prompt page](/prompts/bookkeepers/receivables-follow-up-agent/).

### Pros of DIY prompting

  - Free, or nearly - any chat assistant works.
  - A first draft in minutes instead of hours.
  - Fully flexible: tweak the prompt for any edge case.

### Cons of DIY prompting

  - You become the workflow designer: prompts, test data and output rules are yours to write, test and maintain.
  - Output drifts between sessions unless you re-paste the rules every run.
  - Nothing is saved for you - sheets, structure and context are rebuilt each time.

## Way 3: with AI Agent Skills ($19, one-time)

The [Receivables Follow-up Agent](/bookkeepers/receivables-follow-up-agent/) is this job already designed: fixed evidence rules, output contract, test fixtures and stop points. You ask once:

> Hello, show me which customer invoices need a reminder

And a finished, review-ready artifact lands in your own Drive:

| Customer          | Invoice  | Amount due | Days overdue | Reminder draft                                           | Approval status |
| ----------------- | -------- | ---------- | ------------ | -------------------------------------------------------- | --------------- |
| Bright Foods Ltd  | INV-1042 | $3,850     | 18 days      | Reminder draft: polite second notice, statement attached | Ready to send   |
| Copperline Studio | INV-1038 | $1,200     | 7 days       | Reminder draft: friendly first nudge with payment link   | Ready to send   |

*Sample data shown. Your workspace fills with your real work.*

Setup takes about 10 minutes: buy, hand the three files to the assistant you already use (Instinct, ChatGPT, Claude, Gemini or any other assistant that reads files), approve the fictional-data test. Then it runs on a standing cycle or a one-line ask, and stops at every human gate. [Full method](/how-it-works/).

### Pros of the ready-made agent

  - About 10 minutes to a tested setup, not an afternoon of prompt tuning.
  - The same output shape every run - evidence rules and stop points are already designed.
  - Runs on a standing cycle or a one-line ask; files land in your own Drive.

### Cons of the ready-made agent

  - Costs $19 once, where DIY prompting is free.
  - The output format is opinionated - you adapt the template rather than rebuild it.
  - It still stops and waits for your approval at decision points; it is not zero-touch.

[Get the Receivables Follow-up Agent · $19](https://aiagentskillsbiz.lemonsqueezy.com/checkout/buy/24968e1c-6df3-45e8-9ddf-4ccf72dae172)

## The honest comparison

|                      | Way 1: manual                        | Way 2: DIY AI                                  | Way 3: $19 agent                   |
| -------------------- | ------------------------------------ | ---------------------------------------------- | ---------------------------------- |
| Time to first result | an hour a week, plus the awkwardness | An afternoon of prompt tuning                  | About 10 minutes, tested setup     |
| Every run after      | Same hours, every time               | Re-paste the rules, sheet and context each run | One short ask, or a standing cycle |
| Consistency          | Depends on the day                   | Drifts between sessions                        | Same output shape every run        |
| Cost                 | Your hours                           | Free, plus your time                           | $19 once, files kept forever       |

The manual way teaches you the job. DIY prompting is fine for a one-off. The agent wins when the job repeats every week.

More: the [Receivables Follow-up Agent product page](/bookkeepers/receivables-follow-up-agent/) · the [invoice follow-ups guide](/agents-for/bookkeepers/invoice-follow-ups/) · [AI agents for bookkeepers](/agents-for/bookkeepers/)

## Questions people ask

### What is the fastest way to chase overdue invoices?

The $19 ready-made agent: about 10 minutes of setup, then one short ask per run. Manual takes an hour a week, plus the awkwardness; DIY prompting takes an afternoon of tuning plus upkeep.

### Can I chase overdue invoices without AI?

Yes - the manual steps are on this page. Expect an hour a week, plus the awkwardness each time the job runs.

### Is the $19 agent worth it over DIY prompting?

If the job repeats weekly, yes: you stop rebuilding prompts and re-pasting context every run. For a one-off, DIY prompting is fine and free.

Last updated 13 September 2026 · Reviewed by the AI Agent Skills team.