Automation time savings estimate prompt: free ChatGPT template
Updated · By Robert Breen
Use this when you need to decide whether a workflow is worth building, or explain one to a partner or owner. General claims about hours saved don't help; your own minutes do. This prompt does the arithmetic on numbers you supply, includes the time the automation still takes to set up and look after, and labels every figure with where it came from, so anyone can check it.
Have a professional review it. This prompt helps you explain your own numbers, not give financial advice. Have your accountant or financial advisor review anything you will act on.
The prompt
Copy it into ChatGPT (or Claude, Gemini or Copilot) and replace every [BLANK] with your own details. It uses the four parts from Prompt Writing 101: Role, Context, Task and Format.
Role: You are helping [BUSINESS] estimate the time and cost of one automation honestly, for an owner who wants plain numbers.
Context: The task today: [TASK TODAY]. With the automation: [TASK AFTER]. Setup and upkeep: [SETUP AND UPKEEP]. Tool costs I looked up on the vendors' pricing pages: [COSTS]. Our hourly cost for the person doing the task is [HOURLY COST]. Use only these numbers. Do not add industry averages, outside statistics or prices of your own.
Task: Calculate weekly minutes today and after, minutes saved per week and per year, the value of that time, the yearly tool cost, and weeks until setup is paid back. Then name the numbers that would change the answer most, and what it does not save.
Format: A table with each figure, its formula and its source ("your number" or "calculated"), then three plain sentences for the owner. Round to whole minutes and dollars.Fill in the blanks
[BUSINESS]- Your business name.
[TASK TODAY]- How often it happens and how long it takes now, timed.
[TASK AFTER]- What a person still does afterward.
[SETUP AND UPKEEP]- Build time once, plus monthly checking time.
[COSTS]- New tool costs you looked up yourself, or "none new".
[HOURLY COST]- What an hour of that person's time costs you.
Example, filled in
A made-up example from the free lesson Daily Job Alerts: Email Each Tech Their Jobs from Google Sheets with n8n. Rapid Flow Plumbing is the made-up plumbing company in the Daily Job Alerts lesson. Every morning someone copies the day's jobs into emails, one tech at a time, and the office manager timed it before deciding whether to build the 7am workflow.
Role: You are helping Rapid Flow Plumbing estimate the time and cost of one automation honestly, for an owner who wants plain numbers.
Context: The task today: each workday morning the office copies about 6 jobs from the Today's Jobs sheet into emails to our techs, which took 20 minutes on average over the two weeks I timed it, 5 days a week. With the automation: n8n emails each assigned job to its tech at 7am, and the office still spends about 5 minutes a day keeping the sheet to today's jobs and checking tech names. Setup and upkeep: about 2 hours to build and test once, plus about 15 minutes a month to check it. Tool costs I looked up on the vendors' pricing pages: none new, because we already pay for an n8n Cloud plan for other workflows. Our hourly cost for the person doing the task is $30. Use only these numbers. Do not add industry averages, outside statistics or prices of your own.
Task: Calculate weekly minutes today and after, minutes saved per week and per year, the value of that time, the yearly tool cost, and weeks until setup is paid back. Then name the numbers that would change the answer most, and what it does not save.
Format: A table with each figure, its formula and its source ("your number" or "calculated"), then three plain sentences for the owner. Round to whole minutes and dollars.What a good answer looks like
- Today 20 x 5 = 100 minutes a week, after 5 x 5 = 25, so 75 saved, each labeled calculated.
- Setup paid back in about two weeks: 120 minutes against roughly 71 saved a week after monthly checks.
- Tool cost shown as none new, with no price invented for the n8n plan.
- A note on what it doesn't save: jobs with no tech still need a person, because the Filter skips them.
How to check it before you use it
An AI draft can sound right and still say something you never told it. Use the habit from the Reply Faster lesson: check every promise, name, date and number against what you gave it before anything goes out.
- Time the task yourself for a week or two before you run this. A guess in means a guess out.
- Look up current prices on each vendor's pricing page yourself. Prices change, and the prompt should never supply them.
- Count upkeep honestly, like reconnecting Google.
- Treat the result as a planning estimate for your own decision, not a promise to anyone.
Why this prompt works
Labeling each figure as your number or calculated makes the estimate checkable, and banning outside statistics keeps borrowed claims out of a decision about your own business.
Practice it in the free lesson
Daily Job Alerts: Email Each Tech Their Jobs from Google Sheets with n8n: Every morning at 7, n8n reads a plumbing company's jobs sheet, skips anything not assigned yet, and emails each job to the tech it's assigned to — customer, address, time and what's wrong. No AI, just a clean first… You do every step yourself in a practice copy of n8n, and nothing touches your real accounts.
Also useful: Find and Use n8n Templates
Terms used here
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Frequently asked questions
- What if the automation uses the OpenAI API?
- Add it to the costs. The API is pay-as-you-go and separate from ChatGPT plans, so check your own usage page after a test week.