Free commercial planning tool
Commercial EV Charging ROI Calculator
Estimate direct charging revenue, annual operating contribution and simple capital payback. Then see the charging price or daily usage needed to reach your target return.
Tax/regulatory treatment checked: 31 August 2026
Usage sensitivity
Utilisation is usually the variable that makes or breaks direct payback.
The table automatically tests half, base and one-and-a-half times your entered daily sessions while leaving every other assumption unchanged.
| Scenario | Sessions/day | Annual energy | Annual operating return | Simple payback |
|---|---|---|---|---|
| Low usage50% of entered sessions | — | — | — | — |
| Base caseYour entered sessions | — | — | — | — |
| High usage150% of entered sessions | — | — | — | — |
Interpret the result
A short payback is only useful if the assumptions are credible.
The calculator is deliberately transparent. It does not hide low utilisation, software costs or VAT inside a single optimistic revenue number.
Validate sessions first. For a new site, traffic and charging demand are more uncertain than hardware cost.
Use marginal electricity cost. Include any charging-specific network or capacity cost separately if it is material.
Separate price from revenue. A VAT-inclusive public tariff is not all retained sales income.
Test operating costs. CPMS, roaming, card processing, connectivity, maintenance and support can materially change low-volume sites.
Do not force every benefit into charger revenue. Hotels and workplaces can justify charging partly through wider business value.
Public charging economics
Your tariff is both a financial input and a regulated customer-facing price.
For public chargepoints, the maximum price a driver can be charged must be displayed clearly in p/kWh before the session. Connection or transaction fees must be incorporated into the displayed p/kWh maximum rather than hidden as a separate charging fee.
This calculator therefore models one customer-facing p/kWh tariff and treats payment/roaming cost as an operator expense.
Business rates
Eligible EV charging sites in England have a new rates relief — but we do not assume it automatically.
The government introduced 100% business-rates relief for eligible EV chargepoint hereditaments in England for ten years to 31 March 2036, backdated to 1 April 2023 where relevant.
Eligibility is site-specific, and the calculator leaves business rates at zero unless you deliberately add a charging-specific amount under “other annual costs”.
Commercial charging ROI FAQ
What the payback number does — and does not — mean.
How is EV charger payback calculated?
This tool calculates annual net sales revenue after output VAT, then subtracts electricity, payment/roaming fees and entered fixed operating costs. Simple payback is net capital investment divided by that annual operating return.
Does the calculator include VAT?
Yes, in a specific way: the entered public customer tariff is treated as VAT-inclusive and the tool removes 20% VAT from sales revenue. Enter electricity cost excluding VAT you expect to recover. The calculator is not a substitute for tax advice.
Does it include financing or corporation tax?
No. The result is a simple pre-financing, pre-corporation-tax cash-return model. Loan interest, depreciation, capital allowances, tax losses and the time value of money are outside the calculation.
Can I use it for free employee or fleet charging?
You can enter a customer price of zero, but the result will show that direct charging revenue does not repay the investment. Free charging can still create value through fleet fuel savings, staff benefits, vehicle readiness or customer attraction; those require a different business-case calculation.
What is the most important assumption?
For revenue-generating public or destination charging, usage is usually the highest-risk assumption. A small change in sessions per day can materially change payback because fixed software, maintenance and capital costs are spread over more or fewer kWh.
Methodology & sources
We do not hard-code a “typical” public charging tariff or business electricity rate.
Those prices vary by contract, location, power, network and commercial strategy. The tool instead asks for your own customer tariff and electricity cost. The tax and regulatory treatment surrounding those inputs is based on current UK government guidance.
- HMRC — VAT liability of supplies from public EV chargepointsPublished May 2026; HMRC's current position remains that public EV charging is standard-rated for VAT.
- GOV.UK — Public Charge Point Regulations 2023 guidancep/kWh pricing transparency, payment, roaming, helpline, open-data and reliability obligations.
- GOV.UK — EV Charging Points business-rates relief100% relief for eligible hereditaments in England through 31 March 2036.
- GOV.UK — Workplace Charging SchemeCurrent capital-support context; WCS runs to 31 March 2027 with a £500-per-socket maximum.
Planning tool, not investment advice: This calculator is a simplified operating cash model. It does not forecast demand, guarantee utilisation, value non-charging benefits or replace accounting, tax, legal or investment advice.
Need the capital number first?
Build the installation budget, then bring it back here.
Our cost calculator models sockets, charger power, civils, electrical capacity and current eligible grant support.