Glossary
Total Cost of Ownership (TCO)
TCO in field service software: how to calculate the real 12-month cost including software, add-ons, payments, and implementation.
Definition
Total cost of ownership (TCO) for field service software is the full 12-month spend on a tool, including: the base subscription, all add-ons, implementation and onboarding costs, and payment-processing fees on card-paid revenue.
TCO is almost always substantially higher than the advertised monthly subscription.
The TCO formula
TCO (year 1) = Base subscription + Add-ons + Implementation cost + (Card revenue x payment-processing rate)
Example: Housecall Pro for a 5-tech plumbing shop
| Cost component | Amount |
|---|---|
| Essentials plan x12 | £2,268 |
| Sales Proposals add-on x12 | £360 |
| Vehicle GPS x5 vehicles x12 | £900 |
| Implementation + onboarding | £400–£800 |
| HCP Payments on £200K card revenue (3%) | £6,000 |
| Year-1 TCO | £9,928–£10,328 |
Versus the marketing page implication of £58/mo (£696/year). The real number is 14x the entry-level sticker.
Example: ServiceTitan for a 20-tech HVAC business
| Cost component | Amount |
|---|---|
| Software at £195/tech/mo x20 x12 | £46,800 |
| Onboarding and implementation | £15,000–£40,000 |
| HVAC flat-rate pricebook build | £5,000–£15,000 |
| Payment processing (vendor rail) | £8,000–£15,000 |
| Year-1 TCO | £74,800–£116,800 |
ServiceTitan’s TCO at 20 techs is defensible if dispatching efficiency gains and first-time-fix-rate improvements generate more than £70K in recovered revenue. Below 15 techs, the maths rarely works out.
What buyers get wrong
Most FSM comparisons rank tools by feature checklist or star rating. The actual buying decision should weight:
- Year-1 TCO at your specific tech headcount and card-payment volume
- Whether you can bring your own payment processor (the single largest variable)
- Implementation complexity (how long until your techs can actually use it without help)
Related concepts
- Payment-processing fee, the biggest single TCO variable
- Add-on creep, how optional features inflate the base
- Bring-your-own-payments, how to cut the payments line
Further reading
- Housecall Pro review, full cost breakdown
- ServiceTitan review, enterprise TCO model
- What is field service software