How to take back control of your rising fuel bill

If you run a ute, a truck, or a fleet, your fuel bill has climbed faster than just about any other cost this year. According to Stats NZ, diesel prices jumped 42.6% between February and March 2026, the biggest monthly increase since monthly tracking began. Petrol rose 18.6% in the same period.

According to Prospa’s latest SME Sentiment Tracker, the share of SMEs naming fuel as their single most pressing cost has nearly tripled in twelve months, from 5% to 14%.

The government has ruled out a fuel excise cut, opting for a targeted boost to the in-work tax credit instead. That helps lower-income families, not the businesses absorbing the costs directly.

This article covers practical strategies, plus a free calculator to estimate your fuel spend and what a 10-20% saving could mean in dollars. If you’re after broader strategies, read our cross-industry guide on protecting your profit margins.

Measure your fuel cost per vehicle and per job

You can’t reduce a cost you haven’t measured. Start by tracking weekly fuel spend per vehicle. For one ute, a spreadsheet and your receipts will do. With a small fleet, a fuel card or tracking app handles it without the admin.

Then break it down further: what’s your fuel cost per job, per delivery, or per shift? Say you’re quoting $2,500 for a job 40km from your base. If fuel for that trip has climbed from $85 to $130, you’ve lost $45 of margin without changing how you work. Without that number in front of you, decisions about pricing, routes, and which jobs to chase are all guesswork.

Your fuel card report is the dataset most operators overlook. Export it to a spreadsheet, drop it into ChatGPT or Claude, and ask which vehicle is costing the most per kilometre and what might explain the gap. A breakdown that would take you an hour to do manually comes back in seconds, and it tends to surface patterns that monthly totals hide.

Not sure what your fuel is actually costing you each week? Use the calculator below to estimate your spend and see what a 10–20% saving could mean in dollars over a year.

Group your jobs by area to cut driving time

Cutting kilometres is one of the simplest fuel savings available to most trades businesses. A sparkie running five jobs across three suburbs instead of five different ones could save 30 kilometres a day. At current diesel prices, that’s $35-$50 a day, or close to $12,000 a year for the same number of jobs.

For solo operators, Google Maps is enough to plan the day’s order. For small fleets, dedicated route optimisation tools like OptimoRoute and Circuit (now Spoke) sort multi-stop runs automatically and factor in real-time traffic.

Construction businesses face the same maths on deliveries. Every depot-to-site round trip that can be combined into a single run saves fuel, time, and wages.

Cut idle time before anything else

Consider a delivery van waiting outside while you sign paperwork, a digger left running between loads, or a courier ute warming up before each drop. The fuel cost of starting a modern diesel back up is negligible, so the old habit of leaving engines on for short stops is genuinely costing you. Switching off for anything over two minutes is the right call.

If you run heavy equipment, schedule operator start-ups around the work rather than letting machines run continuously through breaks. For fleet operators, telematics platforms can identify which vehicles or drivers idle most, which is usually where the biggest savings sit.

Keep your vehicles in good nick to lower fuel use

Tyre pressure alone can shift fuel consumption by 3% or more, and that’s before you factor in oil changes, air filter checks, and the rest of basic servicing. A van that’s overdue for its next service is burning more fuel on every job, so keeping a regular maintenance schedule is one of the lowest-effort ways to hold fuel use in check.

Daily weight matters too. A ute loaded with every tool you might ever need uses more fuel than one packed for the actual day’s work. Five minutes each morning stripping out what you don’t need can pay off across a week.

For multi-vehicle fleets, the question is whether each vehicle is sized for the job it does most. A heavy ute doing short urban runs costs more to fuel than a smaller van on the same routes, and when it’s time to replace a vehicle, total cost of ownership matters more than the upfront price.

Switch to a fuel card and use the cheapest pumps

Business fuel cards like the Z Business Card, bp plus, and Mobilcard wrap three useful things into one product: discounts at the pump, automatic transaction tracking, and a single consolidated invoice each month. For small fleets juggling multiple drivers and receipts, that consolidation alone makes a real difference at month-end.

Then there’s the question of where to fill up. Gaspy shows live diesel and petrol prices across the country, updated by close to a million users in real time. Sending a driver to the cheapest nearby pump instead of the most convenient one looks like a small thing, but it adds up across a fleet over a month.

Once your fleet’s diesel use clears 10,000 litres a month, it’s worth talking to a fuel supplier about bulk purchasing arrangements or an on-site tank.

Apply for the fuel excise and RUC refunds you’re owed

If you use petrol vehicles or machinery off-road (boats, generators, agricultural machinery, equipment running on private land), you can claim back the excise duty component of the petrol price through NZTA Waka Kotahi. Claims are made quarterly using the MR70 form, and you need to keep records of how much fuel each asset used.

For heavy diesel vehicles paying RUC, you can claim a refund for any distance travelled off-road. The total claim must be for $20 or more, and you need to apply within two years of the RUC licence issue date. NZTA’s RUC refunds page covers the process.

For broader tax deductions, our small business tax deductions guide covers what most operators miss.

Build a fuel component into every quote

Transport businesses have been using fuel surcharges for years. They’re newer in trades, but customers who’ve noticed fuel prices climbing tend to accept them when they’re explained clearly.

Adding a line in your quote like “A $X fuel component applies to jobs outside a 20km radius” works better than raising your headline rates quietly. Customers understand transparent pricing, and a labelled line item gives them context for the change.

Pricing zones are worth a second look too. A job 50 minutes from your base costs you more in fuel than one 10 minutes away, so your quote should reflect the distance. With diesel sitting where it is, absorbing the gap across every job will eat into your margin fast.

Close the gap between paying for fuel and getting paid

While fuel costs hit your account immediately, your invoice for the job goes out in 30 days, and you might wait another 30 for the customer to actually pay. For most small operators, that timing gap is where margins quietly compress.

A business line of credit is designed for those scenarios. You draw what you need to cover fuel and other operating costs while invoices clear, then pay it back as the money lands. Interest applies only to what you’ve actually used, not the full facility.

The Prospa Sentiment Tracker shows 17% of NZ SMEs run with less than a month of cash reserves, and close to half have three months or less. For operators in that range, a line of credit can help cover the timing mismatch without forcing you to hold that cash in your account.

A little more certainty can go a long way

Diesel prices are outside your control, but your cash flow doesn’t have to be. The businesses that ride out tight stretches best are usually the ones that organised their funding options before things got hard.