Estimate your monthly road user charges (RUC) bill under the coming post-pay eRUC model, where you would pay for the distance you actually drive each month rather than pre-buying distance in 1,000 km blocks. Enter your monthly kilometres and the RUC rate, and see your estimated monthly bill and annual total.
The default rate is $76.00 per 1,000 km, the current light vehicle RUC rate. The rate is editable so you can model a different figure if it changes under the reform.
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Updated June 2026
Models the planned post-pay eRUC system. Current light RUC rate $76.00 per 1,000 km.
1. Distance Driven
km/mth
2. RUC Rate
$
Your Estimated Post-Pay RUC Bill
RUC Rate
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Per 1,000 km (incl GST)
Monthly Bill
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For distance driven
Annual Total
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12 months at this rate
Effective Cost / km
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RUC only (no admin fee)
Important: Monthly post-pay RUC is not yet available. The reformed eRUC system is expected to allow monthly post-pay billing through approved private providers from around 2027. The current system is pre-paid in 1,000 km blocks, with a per-purchase admin fee ($12.44 online, $13.71 at an agent). Final pricing, provider charges and timing have not been confirmed, so treat these figures as an indicative estimate of distance-based RUC only. The rate above is editable so you can model any future rate.
Estimated Bill at Different Monthly Distances
Monthly km
Annual km
Monthly Bill
Annual Total
Monthly Bill Breakdown
RUC rate-
Monthly distance-
Rate per km-
Estimated monthly bill-
Annual Projection
Monthly bill-
Months per year12
Estimated annual km-
Estimated annual total-
Summary:Enter your monthly distance above.
What This Calculator Estimates
This tool models a future monthly post-pay road user charges bill, where you pay for the distance you actually drive each month instead of pre-purchasing distance in 1,000 km blocks. The maths is straightforward: your monthly bill equals the kilometres you drove that month, divided by 1,000, multiplied by the RUC rate. At the current light vehicle rate of $76.00 per 1,000 km, driving 960 km in a month produces a bill of about $72.96, and roughly $875 over a full year of similar driving.
How Monthly RUC Billing Would Work
Under the planned eRUC model, your vehicle's distance would be recorded electronically, either through an in-vehicle device or an approved app, and you would be sent a monthly invoice for the kilometres travelled. This is similar to how electronic RUC already works for many heavy trucks. The key differences from today's system are that you would pay after driving rather than in advance, billing would be monthly, and the per-purchase admin fee that currently applies ($12.44 online) would no longer be charged on every top-up.
The Current System (Pre-Paid Blocks)
Right now, light electric vehicles and diesel vehicles must pre-buy distance in 1,000 km blocks at $76.00 per 1,000 km, plus an admin fee each time they purchase ($12.44 online or $13.71 at an agent). You display a RUC label showing the maximum odometer reading your licence covers, and you must buy more before your odometer exceeds it. The post-pay reform aims to replace this with automated monthly billing. Until that system goes live, the pre-paid block system continues to apply.
Worked Example
Suppose you drive 960 km in a month, the NZ average of about 11,500 km a year, and the RUC rate is $76.00 per 1,000 km.
Effective cost per km: $76.00 / 1,000 = 7.6 cents per km
Annual total at this rate: $72.96 multiplied by 12 = $875.52
These figures match the default output of the calculator above.
Why the Rate Is Editable
The reformed eRUC system has not finalised its pricing, fee structure or the charges that private providers may add for their billing services. The $76.00 per 1,000 km default reflects the current light vehicle rate, but you can change it to model a different figure, for example the reduced $38.00 plug-in hybrid rate or any rate that may apply under the new system. The calculator deliberately excludes any provider service fee, because no such fee has been confirmed.
When Will It Be Available?
The Government has announced it will move all vehicles onto RUC over time and amend the Road User Charges Act 2012 to let approved private providers offer modern, automated billing. Monthly post-pay billing for light vehicles is expected to become available from around 2027. The exact timing, the list of approved providers, and what they can charge are still being worked through, so the dates and figures here are indicative.
Related Calculators
RUC Calculator: the current pre-paid block system, with admin fees and bulk-buy savings.
Sources: Beehive eRUC next steps announcement, transition to electronic road user charges (beehive.govt.nz). Ministry of Transport, road user charges and revenue system reform (transport.govt.nz). NZTA Waka Kotahi RUC rates and transaction fees (nzta.govt.nz/vehicles/road-user-charges).
This calculator provides an indicative estimate only of distance-based road user charges under a future monthly post-pay model that is not yet in effect. It does not include any provider service fee, GST adjustments beyond the GST-inclusive RUC rate, or admin fees, because the reformed system's charges are not finalised. The current system is pre-paid in 1,000 km blocks. Check nzta.govt.nz, transport.govt.nz and beehive.govt.nz for the latest official position and to purchase RUC today.
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