Is it cheaper to drive or take public transport once congestion charging applies?

It depends on your daily costs. Driving usually combines fuel, parking and (under congestion charging) a daily charge for entering the priced zone. Public transport is a single daily fare. Adding a congestion charge raises the cost of driving and often tips the balance towards public transport, especially where parking is expensive. As an example, driving at $8 fuel, $20 parking and a $5 congestion charge is $33 per day, while a $11 daily public transport fare is far cheaper. Over 220 commuting days that is $7,260 to drive versus $2,420 by public transport, a saving of $4,840 a year. Enter your own figures above to compare your situation.

What costs should I include when comparing driving with public transport?

For driving, include the obvious running costs you pay every commuting day: fuel (or charging) for the trip, parking at or near your destination, and any congestion charge for entering the priced zone. For a fuller picture you could also factor in tolls, vehicle wear and depreciation, insurance and road user charges, though those are harder to attribute to a single trip. For public transport, include the daily fare, allowing for any return trip, transfers, or off-peak and capped-fare discounts your operator offers. This calculator focuses on the direct daily out-of-pocket costs so the comparison is clear and easy to adjust.

Does this calculator account for travel time?

No. This calculator compares money only, not time. Driving and public transport can take very different amounts of time depending on traffic, the route and how often services run, and a congestion charge is partly designed to reduce traffic and speed up trips. Time has a value too, so if one option is much faster you may judge it worth a higher cost. Use this tool for the dollar comparison, then weigh the time difference and convenience separately against your own value of time.

Congestion Charge vs Public Transport Calculator

Compare the cost of driving into a priced zone (fuel, parking and a daily congestion charge) against taking public transport. Enter your daily costs and how many days a year you commute to see the annual cost of each option, which one is cheaper, and the yearly difference.

Congestion charging (also called time-of-use charging) is not yet running in New Zealand, so the congestion charge field is fully editable. Set it to a rate you expect, or to $0 to compare driving and public transport without it.

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Updated June 2026 Editable rates. Congestion charging not yet in force in New Zealand.

1. Cost of Driving (per day)

Fuel (or charging) cost per day

Parking cost per day

Congestion charge per day (editable, not yet set)

2. Cost of Public Transport

Public transport fare per day (include return trip)

Days you commute per year

Custom days per year

days/yr

Annual Cost Comparison

Drive (per year)

Fuel + parking + charge

Public Transport (per year)

Daily fare x days

Cheaper Option
-
 

Annual Difference

You could save

Driving Breakdown

Fuel / charging per day-

Parking per day-

Congestion charge per day-

Total to drive per day-

Commuting days per year-

Annual cost to drive-

Public Transport Breakdown

Fare per day-

Commuting days per year-

Annual cost on public transport-

Annual cost to drive-

Annual difference-

Summary: Enter your daily costs above.

How This Comparison Works

This calculator adds up the direct daily out-of-pocket costs of each way you can get to work, then multiplies by the number of days you commute in a year. Driving combines fuel or charging, parking and a daily congestion charge for entering the priced zone. Public transport is a single daily fare. The option with the lower annual total is the cheaper one, and the difference is what you could save by switching.

Worked Example

Using the default figures: driving costs $8 fuel, $20 parking and a $5 congestion charge, which is $33 a day. Public transport is $11 a day. Over 220 commuting days a year that is:

Drive: $33 x 220 = $7,260 per year
Public transport: $11 x 220 = $2,420 per year
Difference: $7,260 - $2,420 = $4,840 per year cheaper on public transport

In this example public transport is the cheaper option by $4,840 a year. The bigger the congestion charge and the more expensive the parking, the larger that gap becomes. Change any figure above to match your own commute.

Why Congestion Charging Changes the Maths

A congestion charge is a daily fee for driving into a defined zone at busy times. It is designed to reduce traffic by encouraging some drivers to travel at off-peak times, share rides, or switch to public transport. Because it adds a fixed amount to every driving day on top of fuel and parking, it raises the cost of driving without changing the cost of taking the bus or train. For many commuters that extra daily cost is enough to make public transport the cheaper choice, particularly where city parking is already expensive.

What Is and Is Not Included

This tool deliberately keeps to the direct daily costs you can see and adjust: fuel or charging, parking, the congestion charge, and the public transport fare. It does not include vehicle depreciation, insurance, maintenance, road user charges, tolls, or the value of your time. Those costs are real but harder to attribute to a single trip. If you want a fuller running-cost picture for the car side, use the fuel and vehicle cost calculators linked below alongside this comparison.

Time Is Not Money Here

This calculator compares dollars only. Driving and public transport can take very different amounts of time, and congestion charging is partly intended to make remaining car trips faster by reducing traffic. If one option saves you a lot of time, you may decide it is worth a higher cost. Work out the dollar difference here, then weigh the time and convenience separately.

Note on New Zealand Congestion Charging

As at June 2026, congestion charging (time-of-use charging) is not yet operating anywhere in New Zealand. Legislation to enable it has been progressed and Auckland is the most likely first scheme, but the charge amounts, zones and hours have not been finalised. For that reason the congestion charge in this calculator is an editable input rather than a fixed rate. Enter the rate you expect, or set it to $0 to compare driving and public transport as they stand today, and update it once an official charge is confirmed.

Related Calculators

Auckland Congestion Charge Calculator: estimate your yearly congestion charge bill.
Petrol vs Public Transport Calculator: compare petrol running costs with fares.
Fuel Cost Calculator: work out the fuel cost of any trip.

Sources: Auckland Transport (at.govt.nz) for public transport fares and proposed time-of-use charging. Ministry of Transport (transport.govt.nz) for congestion charging policy and the Land Transport Management (Time of Use Charging) framework.

This calculator provides indicative estimates only and compares direct daily costs, not total cost of ownership or travel time. Congestion charging is not yet in force in New Zealand and the rates used here are illustrative and editable. Public transport fares and parking costs vary by location and operator. Check at.govt.nz and transport.govt.nz for current information.