The True Cost of Keeping an Old Car in NZ (2026): Every Cost, Three Real Examples and a Free Calculator

Most people who keep an old car do it because it feels free. The loan is paid off, it still starts most mornings, and selling it sounds like a hassle. But “paid off” is not the same as “free”. Between rego, WoF, insurance, fuel, servicing, tyres and the surprise repair bills that start arriving after year twelve, a typical old car in New Zealand quietly costs its owner $80 to $150 a week. A second car that mostly sits in the driveway still costs around $2,500 a year.

I buy old cars across West Auckland every week, and the most common thing owners tell me once they add it up is: “I had no idea it was that much.” So this guide does the adding up for you. It breaks down every running cost of an older car in NZ in 2026, gives three worked examples, and includes a free calculator so you can plug in your own numbers. Use it to decide whether to keep, fix or sell. You are welcome to share or link to it.

The 8 costs of keeping an old car in NZ

Every car, old or new, carries the same eight costs. What changes as a car ages is the balance between them: depreciation shrinks, but repairs grow, and eventually repairs win.

1. Fuel (or electricity)

Fuel is the biggest single cost for most drivers. The average NZ light vehicle covers somewhere around 11,000–12,000 km a year according to Ministry of Transport fleet data. An older petrol hatch using 7–8 litres per 100 km burns roughly 800–900 litres a year doing that. At Auckland pump prices of around $2.60–$2.90 a litre for 91, that is $2,100–$2,600 a year. Older cars also tend to use more fuel than their original rating as injectors, oxygen sensors and tyres wear. Prices move weekly, so check the latest averages on MBIE’s weekly fuel price monitoring.

2. Registration (vehicle licensing)

Annual rego for a typical petrol car runs at roughly $110–$140 a year, made up mostly of the ACC motor vehicle levy plus NZTA fees. Diesels and EVs pay a lower licence fee but pay Road User Charges on top (see below). Exact figures depend on fuel type and vehicle class, so use the NZTA licensing fees page for your car.

3. Road User Charges (diesel, EV and plug-in hybrid)

If your car runs on diesel, or is an EV, you buy RUC by the kilometre. At around $76 per 1,000 km for a light vehicle in 2026, a diesel ute doing 15,000 km a year pays about $1,140 a year in RUC alone. Plug-in hybrids pay a lower rate. Petrol cars pay their road tax through fuel excise instead, which is already in the pump price. Current rates are on the NZTA Road User Charges page, and if you sell or scrap a car with unused RUC you may be owed a refund: see our rego and RUC refund guide.

4. Warrant of Fitness

Cars first registered before 1 January 2000 need a WoF every six months; newer cars over three years old need one every year. The inspection itself costs about $60–$90, but the real cost of a WoF on an old car is what it finds. Rust in the sills, worn ball joints, perished bushes, leaking shocks and tired brakes are the classic failures on 15-year-old Japanese imports. A single fail can cost $300–$1,500 to put right. More on that in our guide to selling a car without a WoF.

5. Insurance

Many owners of older cars drop to third party, fire and theft, which typically costs $300–$600 a year. Comprehensive cover on an older car often costs $700–$1,200, and it is worth asking yourself whether that is sensible when the car’s agreed value is only a few thousand dollars. Auckland premiums sit above the national average because of higher theft and claim rates.

6. Servicing and consumables

One or two oil-and-filter services, wiper blades, a battery every four or five years and the odd bulb add up to $400–$700 a year. Cars with a timing belt due (usually every 90,000–150,000 km) add a one-off $700–$1,200 job.

7. Tyres

A set of four budget tyres fitted and balanced is around $400–$700 for a small car and $900–$1,600 for a ute or SUV. Spread over their life, that is $150–$400 a year.

8. Repairs and depreciation

This is the pair that decides whether an old car is worth keeping. Depreciation, the value the car loses each year, is small on an old car: maybe $300–$800 a year on a $3,000–$6,000 vehicle. Unplanned repairs go the other way. From around 12–15 years old, budgeting $800–$1,800 a year for repairs is realistic for a typical Japanese import: suspension, CV joints, radiators, alternators, starter motors, exhaust and the occasional transmission or head gasket problem. European cars of the same age usually cost more. Our repair or scrap decision framework covers how to judge individual repair bills.

What an old car really costs: three worked NZ examples

Here are three of the most common situations we see in West Auckland, costed using mid-range 2026 figures. They are estimates, not quotes, but they are realistic for each type of car.

Assumptions: 91 petrol at $2.75/L and 7.5 L/100 km; diesel at $1.95/L and 9.5 L/100 km; RUC at $76 per 1,000 km; one WoF a year; third party fire & theft insurance on the hatch and second car, comprehensive on the ute. Figures rounded.

Two things jump out. First, the hatch costs about $100 a week even though it is “paid off”. Second, the idle second car is the most expensive per kilometre by a long way, because most of its costs are fixed: rego, WoF, insurance and the slow decay of rubber, batteries and brakes happen whether you drive it or not.

Calculator: what does your old car really cost you?

Plug in your own figures. Every box is pre-filled with a typical 2026 NZ value, so change only what you know. Nothing you type is sent anywhere; the sums happen in your browser.

If the yearly total is more than the car is worth, or if one upcoming repair would cost more than half its value, it is usually time to sell. Call 0800 705 243 with your plate number for a firm cash figure to compare against.

The hidden cost of the car that just sits there

Around West Auckland we collect a lot of cars that have not moved in months: the old family wagon kept “just in case”, the project car under a tarp in Titirangi, the second car left behind after someone started working from home. They feel free because nobody is driving them. They are not.

• Fixed costs keep running. If you keep it registered and insured, that is $500–$700 a year before it turns a wheel.
• Parked cars deteriorate faster than you’d think. Batteries go flat and die, tyres develop flat spots and perish, brake discs rust, fuel goes stale, and seals dry out. A car that sits for a year commonly needs $500–$1,500 of work to get back on the road.
• Value keeps falling. Every month it sits, it is a month older and, often, a month closer to scrap price. Rust in a damp West Auckland section speeds that up.
• Letting rego lapse doesn’t end your obligations. If you put the licence on hold you avoid the fee, but the car must stay off the road. If you simply stop paying, NZTA treats it as unlicensed and you can be fined if it is on a public street. Our notice of disposal guide explains how to get a car out of your name properly when you do sell.

The honest maths: a car that sits for two years can easily cost $2,000–$4,000 in fixed costs and decay, while its sale value drops by hundreds or more. For many people the cash it would fetch today is worth more than the “just in case”.

When does an old car stop being worth keeping?

There is no single age where a car becomes a bad deal. A well-kept 20-year-old Corolla can be cheap to run; a 10-year-old European with a failing gearbox can be a money pit. These are the signals we see most often in cars people sell to us:

1. Repairs exceed depreciation plus a sensible margin, every year. If you are spending $1,500+ a year on repairs to keep a $3,000 car running, you are effectively buying the car again every two years.
2. One repair costs more than half the car’s value. Head gaskets, automatic transmissions, structural rust and hybrid battery packs are the usual culprits. This is the classic “50% rule”.
3. It fails its WoF on structural rust. Rust in sills, floor pans or suspension mounts is expensive to repair properly and tends to come back.
4. Reliability affects your life. Missing work because the car won’t start, or paying for towing, has a cost the spreadsheet doesn’t show.
5. It isn’t being used. If it does under 3,000 km a year, the cost per kilometre usually beats a taxi, rideshare or the occasional rental.

If two or more apply, get a firm offer and compare it with the yearly cost from the calculator. Even non-running, written-off and WoF-failed cars have value for their parts and metal. See our 2026 price guide and scrap car value guide for realistic numbers.

How to cut the cost if you keep it

If your car still makes sense, these are the changes that save real money:

• Review insurance every year. Drop from comprehensive to third party, fire & theft once the car’s value no longer justifies the premium, and raise your excess if you can afford it.
• Keep tyres at the right pressure. Under-inflated tyres wear faster and can add several percent to fuel use. Gen Less (EECA) has good, practical fuel-saving tips.
• Use discount fuel days and apps. Supermarket vouchers and price-comparison apps can save 10–30c a litre, which is $100–$250 a year for an average driver.
• Fix small problems early. A $60 CV boot replaced now beats a $400 CV shaft later; a coolant leak ignored can turn into a head gasket.
• Use a good independent mechanic. Labour rates at independents are usually well below dealer rates for older cars.
• Put the rego on hold if it is off the road. If the car won’t be driven for a few months, NZTA lets you put the licence on hold so you stop paying for it.
• Get rid of the second car. For many households this is the single biggest saving available, often $2,000–$3,000 a year plus whatever the car sells for.

If selling is the answer

We’re a registered motor vehicle trader based at 16 Princes Street, Onehunga, and we buy cars in any condition across every West Auckland suburb, from Henderson and New Lynn to Titirangi, Massey and Kumeu. That includes non-runners, written-off cars and cars that have failed their WoF. Quotes are firm, removal is free, you are paid before the car moves, and we lodge the notice of disposal for you. Start on our Cash For Cars West Auckland homepage or call 0800 705 243.

Methodology and sources

The figures in this guide are estimates for 2026 built from published government rates and the running costs we see on the cars we buy and their owners report to us. They are a guide to scale, not precise prices for any individual car. Fuel prices, RUC rates and licensing fees change, so check the official sources below before relying on any single number.

• Average annual distance: Ministry of Transport fleet statistics
• Fuel prices: MBIE weekly fuel price monitoring
• Licensing fees: NZTA Waka Kotahi licensing fees
• Road User Charges: NZTA Waka Kotahi RUC rates
• WoF rules: NZTA Waka Kotahi warrant of fitness
• Repair, servicing, tyre and insurance ranges: typical West Auckland figures from our own vehicle purchases and owner reports, 2025–2026

For the bigger picture on how old New Zealand’s fleet is and what happens to cars at the end of their life, see our NZ end-of-life vehicle statistics 2026.

Frequently Asked Questions