The ROI of field service software is the net gain from the software divided by its total cost, measured over a set period, usually the first year. To get a number you can trust, count every cost (subscription, set-up, training, your own time), count only savings you can tie to a baseline you measured before go-live, and show payback in months as well as a percentage. This guide shows how, with a worked example in pounds.
TL;DR
- ROI = (annual benefit minus total cost) divided by total cost. Payback is how many months it takes for cumulative savings to cover cumulative cost.
- The benefits that usually carry the case are admin time, repeat visits, unbilled work and missed SLAs. Each needs a baseline figure from before you switch.
- Count the full cost: subscription, data migration, training, and the time your team spends on the change. Published implementation experience shows these can add up to far more than the licence.
- Treat headline ROI percentages from vendors as a prompt to check assumptions, not as a forecast for your business.
- Re-measure the same metrics at 90 days and 12 months to confirm the return is real.
Table of Contents
- What ROI means for a field service business
- The ROI formula, step by step
- What to count on the cost side
- What to count on the benefit side
- A worked example in pounds
- How reliable are published ROI figures?
- Baseline metrics to record before you switch
- Perspective
- Turning the calculation into a decision
- See what it could return for your business
- FAQ
- Sources
What ROI means for a field service business
In a service business, ROI is not a software metric. It is the question every owner asks before signing anything: will this pay for itself, and how soon?
The return comes from three places:
- Time released. Hours that office staff and engineers no longer spend re-keying, chasing paperwork or phoning for job details.
- Money protected. Repeat visits avoided, SLA penalties avoided, jobs that no longer go unbilled, certificates that no longer lapse unnoticed.
- Capacity gained. More jobs through the same team without adding headcount.
Only the first two are easy to put in pounds. Capacity is real, but it only becomes money when you sell the extra work, so count it cautiously.
The ROI formula, step by step
The arithmetic is simple. The discipline is in the inputs.
ROI (%) = (total annual benefit − total annual cost) ÷ total annual cost × 100
Payback (months) = one-off costs ÷ (monthly benefit − monthly running cost)
The payback definition used in UK public-sector appraisal is the same idea made stricter: HM Treasury guidance defines payback as the year in which cumulative present value of savings exceeds cumulative present value of costs. For a small or mid-sized firm, a simple monthly cumulative view over 12 to 24 months is enough, but the principle holds: costs and savings are compared over time, not on one line of a spreadsheet.
To use it:
- List every cost, including your own time.
- Measure your current baseline for each benefit area.
- Estimate a realistic improvement for each, and write the assumption down.
- Convert each improvement to pounds a year.
- Calculate ROI and payback, then test it with a pessimistic case.
What to count on the cost side
Most ROI claims look good because the cost side is thin. Include:
- Subscription. Our published plans start from £99 per month (Starter), £249 per month (Professional) and £499 per month (Business); Enterprise has no published price. See the pricing page for what each tier includes.
- Data migration. Cleaning customer lists, site and asset registers and moving them out of spreadsheets takes real hours.
- Training. Engineers and office staff need time on the system before it saves any.
- Parallel running. A few weeks of old and new systems side by side.
- Integrations and extras. Accounting, payments and vehicle tracking connections, and any support you choose to buy.
- Management time. Someone owns the rollout.
The lesson from larger projects is that the licence is rarely the whole bill. An academic case study of an enterprise system in the UK found that implementation cost approximately double the initial software costs once process redesign, add-ons, training, project management and maintenance were included. A service business with ten engineers is not an ERP programme, but the point carries: budget for the change, not just the subscription.
What to count on the benefit side
These are the areas where operational improvements most often turn into measurable pounds. Pick the ones that match your pain, not all of them.
Admin time in the office
Double entry between a diary, a job sheet, a spreadsheet and an accounts package is the commonest hidden cost. Measure it: ask schedulers and office staff to log time spent on re-keying, chasing job updates and building reports for a fortnight. Multiply the weekly hours by a loaded hourly cost (wages plus employer costs), then by working weeks.
A lot of that saving is capacity, not redundancy. The same people handle more jobs, or spend time on customers rather than paperwork. The same logic applies to reducing operating costs through software automation rather than cuts: the gain is in work that no longer needs doing by hand.
Repeat visits and first-time fix
Every return trip costs an engineer's time, fuel, van time and often goodwill. Count your repeat visits per 1,000 jobs, multiply by your average cost per visit, and then estimate a modest reduction. Better job history, asset records and parts visibility on the engineer's phone are what drive this. We cover the mechanics in our guide to first-time fix rate.
Unbilled and late-billed work
Work finished but never invoiced is pure margin lost. Run a report of completed jobs without an invoice at month end. If the number surprises you, that is your first benefit line. Even where nothing is lost, invoicing days after the visit instead of on the day delays cash, which matters most to growing firms.
SLA breaches and contract penalties
For contract work, a missed response or fix time can mean service credits or lost renewals. Count breaches over the last 12 months and their cost. Priority-based scheduling is one way to reduce them; see our piece on priority-based scheduling for UK operations.
Travel and routing
Fewer wasted miles are an easy saving to model but a risky one to promise, because routing changes can disrupt dispatch if rushed. Treat it as an upside, and pilot it first: route optimisation without breaking dispatch explains how.
Compliance and audit effort
For gas, electrical, F-Gas, fire safety, water hygiene and lifting work, the cost is in assembling certificates, evidence and registers when a client or auditor asks. Time spent searching for them is measurable. The avoided cost of a lapsed certificate or failed audit is harder to quantify, so list it separately as risk reduction rather than folding it into the headline figure.
A worked example in pounds
The figures below are an illustration with assumed inputs, not a result from any customer. Replace them with your own.
The business: 10 engineers, about 2,000 jobs a year, a small office team. It chooses a plan at £499 per month.
| Item | Assumption | Annual figure |
|---|---|---|
| Subscription | £499 × 12 | £5,988 |
| One-off set-up, migration and training | Assumed time and cost | £3,000 |
| Total year-one cost | £8,988 | |
| Office admin time saved | 10 hours a week × £18 loaded cost × 48 weeks | £8,640 |
| Repeat visits avoided | 60 fewer visits × £85 cost each | £5,100 |
| Unbilled work recovered | 20 jobs × £120 | £2,400 |
| Total year-one benefit | £16,140 |
Net gain: £16,140 − £8,988 = £7,152.
ROI: £7,152 ÷ £8,988 = about 80% in year one.
Payback: monthly benefit is £1,345, and monthly running cost is £499, leaving £846 a month to recover the £3,000 one-off cost. That gives payback in just under four months.
Notice what the example leaves out: faster cash collection, fewer SLA breaches, and compliance risk. They are real, but each needs a baseline before you can price it. Add them only when you can.
Notice also how sensitive the result is. Halve the admin saving and the repeat-visit saving and year-one benefit falls to about £8,070, which is just below cost. Run that pessimistic case before you decide, and ask whether you would still proceed if it were the real one.
How reliable are published ROI figures?
Search for this topic and you will find percentages from a few hundred per cent upwards. They are not meaningless, but they are not forecasts for your firm. Before relying on any of them, check:
- Whose numbers? Vendor-commissioned studies and case studies describe selected customers.
- What was the baseline? Returns look larger when the starting point was paper or unmanaged spreadsheets.
- What was counted as cost? Many figures leave out internal time and training.
- Over what period? A three-year composite is not a first-year result.
- What was the scale? A programme for thousands of engineers behaves differently from one for twelve.
The Scottish Water example shows both the promise and the context. A published case study on its field services transformation reports first-time fix rising from 49% to 62%, with annual operating-expense savings of £430,000 to £540,000 and 7 to 10% lower contractual overtime. The same document reports more than £715,000 of benefits in the first three months. These figures belong to one large, specific programme, so use them to understand which levers move, not to predict your own result.
The HM Treasury Green Book makes a related point for public spending: value for money is a balanced judgement of objectives, monetisable and unmonetisable impacts, risk and uncertainty. A high ROI figure does not by itself mean the right decision. If your objective is audit-ready compliance or fewer SLA failures, a modest ROI with a clear fix to that problem can be worth more than a bigger number built on shaky savings.
Baseline metrics to record before you switch
You cannot prove a return you did not measure. Capture these for at least a month, ideally three, before go-live:
| Metric | How to measure it |
|---|---|
| Admin hours per week | Short time log from office staff for two weeks |
| Jobs per engineer per week | From your current diary or job records |
| First-time fix rate | Share of jobs completed without a return visit |
| Repeat visits per 1,000 jobs | Count return visits flagged in records |
| Time from job completion to invoice | Median days, from completion date to invoice date |
| Completed jobs not invoiced | Month-end report of unbilled work |
| SLA attainment | Percentage of jobs meeting response and fix targets |
| Time to produce a compliance pack | Time taken for the last audit or client request |
| Overdue certificates or inspections | Number outstanding at a given date |
If your records are patchy, an honest estimate recorded today beats a perfect measurement you never take. Write down how you got each number so you can repeat it later.
Perspective
In our experience, service businesses rarely lose money in one big place. They lose it in small gaps: a job note that did not reach the engineer, a certificate that sat in a van, a completed visit nobody invoiced. Curcle was born inside a real UK service and engineering business, so we have seen how those gaps add up.
That is why we think ROI should be judged on whether the software closes the gaps you actually have, not on a headline percentage. Jobs, customers, assets, compliance, stock, quoting and invoicing in one connected system means the information entered once is the information everyone uses, and the office, the engineer and the manager are looking at the same job.
We build on a simple rule: every click should earn its place. If a step does not save time or reduce risk, it should not be in the software. We also believe AI should assist human judgement, not replace it, and that operational software should show you what needs attention rather than simply recording what has already happened.
Our advice is to pick two or three metrics, measure them before you start, and hold us, and every other supplier, to them at 90 days.
Luke Herridge
Turning the calculation into a decision
Once you have a base case and a pessimistic case, the decision is usually clearer than the spreadsheet suggests.
- Rank benefits by confidence. Savings tied to a measured baseline (admin hours, unbilled jobs) outrank guesses about future growth.
- Match the plan to the need. Do not pay for features you will not use in year one; the plans on our pricing page are designed to let you start where you are.
- Look at fit for your trade. Compliance-heavy work pays back differently from reactive maintenance. Our industries page and HVAC software page show how workflows differ, and facilities management has its own multi-site and SLA needs.
- Set review dates. Diary 90 days and 12 months after go-live to re-measure the same metrics.
- Plan adoption. Software returns nothing if engineers do not use it. A mobile app that works offline matters where signal is poor, and short, role-specific training matters more than a long launch session.
See what it could return for your business
If you run a UK field service, engineering, maintenance or facilities business and are replacing spreadsheets or disconnected tools, Curcle brings jobs, customers, engineers, assets, compliance, stock, quoting and invoicing into one system. Engineers work from a mobile app that is capable offline, and managers see live priorities in the Operations Room.
Look at the plans and prices to put your own subscription figure into the calculation above, or see the features to check which of your baseline problems they address.
FAQ
What is a good ROI for field service software?
There is no universal benchmark, because it depends on your starting point and what you count. A better test is whether the return holds in a pessimistic case and whether payback falls within a period you are comfortable with, such as under 12 months. Be cautious of any single percentage quoted without its assumptions.
How long does it take field service software to pay back?
It depends on set-up effort, how quickly engineers adopt it and which benefits you are targeting. Admin time and unbilled work tend to show up first, since they are visible straight away. Savings from fewer repeat visits or fewer SLA breaches usually take longer to appear in your numbers, so measure at 90 days and again at 12 months.
Should I include soft benefits in the calculation?
Include them separately, not in the headline figure. Better customer experience, lower audit stress and reduced compliance risk are real, but they are hard to price without a baseline. List them beside the ROI so the decision reflects both the hard numbers and the risk reduction, in the spirit of a balanced value-for-money judgement.
What costs do businesses most often forget?
Internal time is the big one: data migration, training, parallel running and whoever manages the rollout. Integrations and any extra support also get missed. Put an honest figure on each before you calculate ROI, otherwise the result will flatter the project.
Sources
- HM Treasury cost benefit analysis guidance for local partnerships
- The Green Book: UK government guidance on appraisal
- The real cost of enterprise system implementation, Inderscience
- Scottish Water reimagines field services with SWIFT
- Reducing OPEX through software automation