“Should I automate this?” usually gets answered by gut feel, which is how businesses end up with clever automations that save nothing and skip the boring ones that would have paid for a holiday. You do not need a spreadsheet with forty tabs to decide well. You need four numbers and about ten minutes. Here is the method we use.

Step 1: Price what the task costs you now

Take one specific, repeating task. Not “admin”, but “chasing overdue invoices” or “writing quotes”. Then work out its real cost, which is more than the minutes on the clock.

Time. How long does one go take, and how often? Say quoting takes 40 minutes and you do it 20 times a month. That is roughly 13 hours a month.

Your hourly cost. Not your take-home. What is an hour of your time worth to the business? A fair rule of thumb: what you would pay someone to do this job for you, or what you could earn doing billable work instead. If your billable rate is £40 an hour, 13 hours is £520 a month.

The hidden costs. This is where manual tasks quietly bleed you, and where most ROI sums go wrong by ignoring it:

  • Mistakes. A mispriced quote, a missed reminder, a double booking. What does one error cost when it happens, and how often does it?
  • Delay. The quote you send that evening instead of that morning, after the customer already said yes to someone faster. Slow costs work, and work is the biggest number on this whole page.
  • The tax on your attention. The task you keep half-remembering to do drains focus even when you are not doing it.

You will not get these to the penny. A sensible estimate beats pretending they are zero.

Step 2: Work out what automation actually saves

Now the other side, and be just as honest here or the sum lies to you.

Time saved. Automation rarely takes a task to zero. Reviewing an AI-drafted quote still takes five minutes even if writing it took forty. So the saving is 35 minutes a go, not 40. Use the realistic number.

Errors and delays removed. If automated reminders mean you stop forgetting to chase, or a same-day quote wins work you were losing, put a figure on that. For many businesses this is bigger than the time saved, because it is about winning revenue, not just saving cost.

Then subtract the costs of automating. Two of them, and people forget both:

  • Setup time. Standing it up properly might take you an afternoon, or a few. That is a one-off cost. Count it.
  • The running cost. The tool’s monthly fee, plus any occasional upkeep when something changes.

Step 3: Do the sum

Put it together into a monthly saving and a payback time.

Monthly saving = (time saved x your hourly cost) + (errors and delays removed) − (monthly tool cost)

Payback time = setup cost (your setup hours x hourly cost, plus any one-off fee) ÷ monthly saving

That second number is the one that decides it. It tells you how many months until the automation has paid for the effort of building it, after which it is pure gain, every month, forever.

Step 4: Decide, with a simple rule

  • Pays back in under 3 months? Do it. This is the easy yes: the automation clears its own cost before you have stopped noticing you built it.
  • Pays back in 3 to 12 months? Probably worth it, especially if the task also annoys you or the saving grows as you get busier. Judgement call.
  • Never pays back, or takes over a year? Do not, however clever it is. A fun automation that loses money is still losing money. Spend the afternoon on one that pays back in three months instead.

A worked example

The Stockport builder we work with was paying £300 a job and waiting three to seven days every time he needed pricing from drawings. Do the sum his way:

  • Cost now: £300 per job in fees, plus the lost work from being days slower than a quicker competitor. Across a month of jobs, thousands.
  • After automating: the system prices the same job the same day, at roughly a tenth of the cost. Time to near zero, delay gone, and he wins the jobs he was losing to speed.
  • Payback: the first month. It was not a close call once the real cost of the old way was on the page.

That is the point of doing the sum. The old way felt normal because he had always done it. Written down, it was obviously expensive, and the decision made itself.

Where to take this

Pick your most annoying repeating task and run it through these four steps today. Even a rough number will tell you whether to act or leave it, and that clarity is worth the ten minutes on its own.

If you would like to do this alongside people who build automations for a living, that is exactly what our AI Automation Masterclass in Manchester is for. We help you price your own tasks and build the automation for the one worth doing. Tickets are normally £20. This one’s free, a limited-time offer to launch the series.

To make the maths quick, use our automation time-savings calculator. Put in your hours and rate and it does the sum for you. And the full ROI worksheet is on the free resources shelf.