The amount you pay for road tax depends on several factors including your location, the type of vehicle, its engine size or CO2 emissions, fuel type, and sometimes the vehicle's age or list price. Here are some key points based on different regions: United Kingdom:

• Road tax (Vehicle Excise Duty) depends on when the car was first registered, its CO2 emissions, fuel type, and list price.
• For cars registered on or after April 1, 2017, the first-year tax is based on CO2 emissions, ranging from £10 for zero-emission cars to over £5,000 for high-emission diesel cars.
• After the first year, a standard rate applies, typically around £195 annually for petrol/diesel/electric cars, with an additional £425 annual charge for cars costing over £40,000 (for 5 years).
• You can pay annually, every 6 months, or monthly by direct debit.
• Detailed rates are available on the UK government website and car tax calculators can provide exact amounts based on your vehicle registration

Oregon, USA:

• Vehicle privilege and use taxes include a 0.5% tax on the retail price of taxable vehicles.
• Additional local taxes may apply depending on the county.
• Specific calculators are available to estimate the tax based on your vehicle's value

Singapore:

• Road tax is calculated based on engine capacity and vehicle age.
• Vehicles over 10 years old incur a surcharge increasing by 10% per year up to 50%.
• You can check your exact road tax amount online by entering your vehicle registration number or engine capacity and age

To find out exactly how much your road tax is, you should use an official online vehicle tax calculator or government service relevant to your location, entering your vehicle registration number or details like engine size, CO2 emissions, and age. This will give you the precise amount you owe.