The month’s courier or freight bill arrives, and the awkward line is the fuel surcharge. It sits outside the base rate, moves around, and is often the first figure a customer disputes when margins are already thin.
Guidance published on 22 April 2026 says fuel surcharges should accurately reflect costs and decrease as relevant costs decrease.
Show the moving parts
If you charge one delivered price and then bolt on a floating percentage when costs rise, you create confusion about what the base price still covers. A cleaner approach is to decide which costs belong in your core rate and which genuinely vary with fuel use. Linehaul, local delivery density and vehicle type all affect that judgement. The point is not a perfect formula; it is a charge you can explain in one minute without hand-waving.
For many owners, the practical choice is between simplicity and precision. A flat surcharge across every route is easy to administer, but it can overcharge nearby jobs and under-recover longer ones. A route-based approach is fairer, though it takes discipline to maintain. Suppose your business sends stock weekly to both central Auckland and rural Northland. One blanket percentage may save office time, yet it weakens your case when a customer asks why the same uplift applies to very different trips.
The second decision is cadence. Reviewing the surcharge every week invites noise and admin. Leaving it untouched for six months makes the charge look arbitrary. A monthly or clearly defined periodic review is often easier to defend, especially if you keep a short record of the assumptions behind it. That record matters internally as much as externally. Staff taking calls need to know whether the surcharge reflects carrier invoices, your own fleet costs, or both.
Review before the busy run
October and November are a sensible time to test the wording on quotes, invoices and account terms before summer volumes build. If the surcharge can change, say what triggers a change, when it will be reviewed, and whether it can move down as well as up. Customers usually accept variability better when the mechanism is visible.
Also look for double counting. If you accepted a higher base freight rate earlier in the year, then kept a separate surcharge unchanged, you may now be layering recovery on recovery. That can damage trust faster than the dollars suggest. Equally, absorbing every increase into the headline price hides useful information from your own sales team when they price jobs.
Clarity here is a commercial tool. It helps you quote faster, defend margins without bluff, and reset charges when the underlying cost moves. If the number needs a long speech, the method probably needs work.
