Comparing fleet charging tariffs: Fixed fees, energy prices and contract risks

To compare fleet charging tariffs meaningfully, apply the complete pricing rules of each offer to the same realistic charging sessions. Include fixed fees, energy prices, charging locations, possible additional costs and contract commitments. At low usage, a low price per kWh can be more expensive than a tariff without a recurring fee. Conversely, a higher fixed fee can make financial sense for vehicles that regularly use public charging. Your fleet’s usage is what matters.

First define which costs you are comparing

Separate the public charging tariff from home charging reimbursements and electricity purchased at your business premises. These areas may be organised in a shared solution, but they have different cost components. An attractive public charging tariff does not automatically justify an investment in hardware or an additional billing service.

Agree a consistent cost basis with finance. Consumer prices are often shown including VAT, while business offers may use net prices. Finance must clarify whether and to what extent taxes are an ultimate cost to your business. Then compare all items on the same basis.

Choose a period that reflects the decision. A monthly comparison may be enough for flexible tariffs. For an annual commitment, holiday periods, vehicles joining or leaving the fleet and one-off costs belong in a yearly assessment. Show the first contract period separately from subsequent ongoing operations.

Create a pricing basket from actual charging sessions

Export several representative months if possible. For each charging session, you need the location or operator, kWh, connection duration, access profile and additional fees. If data is missing, identify the affected volumes. An apparently precise comparison based on estimated stations is less robust than a clearly stated data gap.

Group sessions by driver profile: occasional public charging, regular field work and vehicles supplied largely by public charging. Add relevant countries and network groups. An average across all vehicles can hide the fact that a tariff only suits one subgroup.

Use the same pricing basket for every offer. Support the prices applied with a price sheet, individually agreed terms or a documented price enquiry. Assess tariff suitability using your fleet’s actual on-the-road charging behaviour. Do not apply a private tariff recommendation to your corporate offer without checking it.

Break down every fee by its charging unit

“Monthly fixed fee” is incomplete without a reference unit. It may apply per business, user, card or access account. An inactive spare card could be treated differently from an active driver. Ask to see the calculation for your actual configuration.

Also ask what happens when new employees join, vehicles are returned or access is temporarily unused. A low card fee is of little help if unused access accounts continue to be charged under the contract structure and are missing from the calculation sheet.

Calculate break-even only under suitable assumptions

For two otherwise identical tariffs, the financial threshold is simple to calculate: the additional monthly fixed fee divided by the price saving per kWh. This assumes that the same energy volume can actually be charged at the lower price.

Hypothetical example, with all figures net and not based on real provider prices: Tariff A costs €4 per user per month plus €0.62 per kWh. Tariff B costs €14 plus €0.52 per kWh. All other services, charging locations and fees are assumed to be identical in this example. The additional fixed fee of €10 is offset at 100 kWh per month.

If only 40 percent of the charging volume qualifies for the price saving while other prices remain unchanged, the threshold is 250 total kWh: €10 divided by €0.10 and then by 0.40. Different roaming prices or further fees, however, require the full calculation for each network group.

Assess whether one tariff or several driver groups make sense

A single tariff simplifies rules and administration. Multiple tariffs may match energy costs more closely to different usage patterns. Weigh the potential benefit against the extra tasks: group assignment, switching dates, driver information and checking that the correct access method is used.

Do not base a decision solely on an unusually high month. A driver with high public charging demand during a house move may charge mainly at home for the rest of the year. Use an expected annual volume and show the level of deviation at which switching makes sense.

Avoid a rule that forces drivers into unnecessary detours to achieve a theoretical tariff saving. Our article on ways to reduce fleet charging costs explains how energy, extra time and operational requirements interact. In a tariff comparison, only count savings that are achievable on usable routes.

Make pricing and contractual risks visible

Check which prices are contractually fixed and which may change. A fixed service price does not automatically mean an unchanged energy price at every charge point. Record how price changes are communicated, when they take effect and what agreed options your business has. This is a review of the specific contract offer, not a general statement about termination rights.

Alongside the base case, calculate at least two variations: fewer public kWh and a different share of the relevant networks. Also consider the expiry of a discount. If an offer only wins in the introductory month, make that visible in the decision paper.

An additional burden from minimum purchase commitments or a long contract term must not remain outside the figures as a mere “risk”. If an obligation can be quantified, include it in the relevant scenario. Document points that cannot be quantified, naming a responsible person and a date for clarification.

Conclude with a justified tariff decision

Your decision paper should include total costs, key assumptions, affected driver groups and switching options. A second person should be able to reproduce the same totals from the pricing basket and pricing documents. Record when you intend to review changes in volumes again.

StromNow Business offers central billing and cost reports, as well as charging price comparison in the driver app. Have the specific offer calculated against your pricing basket and its scope of service confirmed.

For a fleet charging cost analysis with StromNow, bring anonymised transactions, current price sheets and your planned fleet development. This gives the tariff decision a verifiable basis drawn from your own operations.