How to Calculate the ROI of Automating a Business Process

Before you invest in automation, you want to know it will pay for itself. Fair enough.

The good news is that calculating the return on investment for a specific automation is straightforward. You do not need a finance degree or a complicated model. You need four numbers and a simple formula.

This guide walks you through the calculation step by step, with a worked example using real UK figures. By the end, you will be able to assess any process in your business and decide whether automating it makes financial sense.

The Formula

Where:

• Annual savings = Hours saved per year × Fully loaded hourly cost
• Annual automation cost = Monthly subscription × 12 (or annual licence fee)

That is it. Everything else is about getting the inputs right.

Step 1: Identify the Process

Pick one specific, well-defined process. Trying to calculate the ROI of “automation” in general is too vague. Instead, choose something concrete:

• Processing purchase invoices
• Sending payment reminders
• Reconciling bank transactions
• Scheduling cleaning jobs
• Generating monthly client reports

The more narrowly you define it, the more accurate your calculation will be.

Step 2: Measure the Current Time Cost

For one week, track how long the process takes. Be specific:

• How many times per week does this task occur?
• How long does each occurrence take?
• How many people are involved?

Multiply to get a weekly total, then multiply by 48 (working weeks per year, after holiday and bank holidays).

Example: Your bookkeeper spends 45 minutes processing each batch of purchase invoices. They do this 8 times per week.

• Weekly time: 45 minutes × 8 = 6 hours
• Annual time: 6 hours × 48 weeks = 288 hours per year

Step 3: Calculate the Fully Loaded Hourly Cost

The fully loaded cost is not just the salary divided by hours. It includes everything you pay for that person to be in their seat:

Divide by working hours per year:

• 52 weeks minus 5.6 weeks holiday = 46.4 weeks
• 46.4 weeks × 37.5 hours = 1,740 working hours
• Fully loaded hourly cost: £38,270 ÷ 1,740 = £22.00 per hour

For a quick estimate, take the salary and multiply by 1.3 to 1.4, then divide by 1,740.

Step 4: Calculate the Annual Savings

Not all of those 288 hours will be eliminated. Automation typically handles 70–90% of a process, with humans reviewing exceptions and handling edge cases.

Use a conservative estimate of 80% (which aligns with industry research showing basic automation reduces processing time by 80%).

• Hours saved: 288 × 0.80 = 230 hours per year
• Value of time saved: 230 × £22.00 = £5,060 per year

Step 5: Determine the Automation Cost

For ClearRun, the costs are transparent:

• Streamline plan: From £350/month (£4,200/year) — covers up to 3 automations
• Transform plan: From £750/month (£9,000/year) — covers up to 8 automations
• One-off setup fee (varies by complexity)

For this example, let us assume the invoice processing automation is one of three automations on the Streamline plan. We will allocate one-third of the cost:

Annual automation cost for this process: £4,200 ÷ 3 = £1,400

Step 6: Calculate the ROI

Your automation pays for itself in under 4 months. Everything after that is pure savings.

A Worked Example: Credit Control

Let us run through a second example to show how the calculation works for a different process.

The process: Chasing unpaid invoices. Your practice manager spends 5 hours per week sending payment reminders, checking who has paid, and following up with late payers.

But here is where credit control automation gets interesting. The time saving is only half the story.

Automated credit control gets invoices paid an average of 54 days faster (Chaser, 2024). If your practice bills £30,000 per month and currently waits an average of 75 days for payment, getting paid 54 days sooner means you have roughly £54,000 less tied up in outstanding invoices at any given time.

That cash flow improvement does not show up in the simple ROI formula, but it is often the most valuable part of the automation.

What the ROI Formula Does Not Capture

The calculation above covers direct labour savings. But there are several other benefits that are harder to quantify:

Error reduction: Fewer mistakes mean less time correcting them, fewer client complaints, and lower compliance risk. If a VAT error triggers an HMRC investigation, the cost dwarfs any automation subscription.

Opportunity cost: The 230 hours your bookkeeper saves could be spent on advisory work billed at £80–£150 per hour. That is potentially £18,400 to £34,500 in additional revenue.

Staff retention: People who spend less time on repetitive tasks tend to stay longer. Replacing a bookkeeper costs £3,000–£6,000 in recruitment alone.

Scalability: Automation handles 500 transactions as easily as 50. When your business grows, you do not need to hire proportionally.

When Automation Does Not Make Sense

To be balanced about this: not every process is worth automating.

Automation delivers the best ROI when the task is:

• Repetitive — it happens the same way, many times
• Rule-based — clear logic determines what happens next
• High-volume — enough occurrences to justify the setup
• Time-consuming — takes meaningful hours each week

Tasks that involve complex judgement, creative thinking, or nuanced client interaction are usually better left to people. Automation should handle the routine so your team can focus on the work that requires their expertise.

Try It Yourself

Here is the framework summarised, ready for you to apply to any process in your business:

1. Name the process
2. Measure weekly time spent (hours)
3. Calculate annual time (weekly hours × 48)
4. Find the fully loaded hourly cost (salary × 1.35 ÷ 1,740)
5. Estimate hours saved (annual time × 0.80)
6. Calculate annual saving (hours saved × hourly cost)
7. Determine automation cost (annual subscription or share of plan)
8. Calculate ROI ((saving − cost) ÷ cost × 100)

If the ROI is above 100%, the automation pays for itself within a year. Above 200%, and you are looking at a return most investments cannot match.

Want to see how this applies to the full cost picture of hiring versus automating? Read our breakdown of the true cost of manual data entry.