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What Car Expenses to Track
Track the bills that belong to one car and no other budget. Fuel and workshop visits stay in their own logs so the year does not double-count them.
Car expenses worth tracking are the amounts that belong to a specific vehicle: insurance, registration and tax, parking, tolls, tires, and repairs that are not already a service row. Rent and groceries stay in the household budget.
A bank app shows a merchant name. It does not show which car, or whether the charge was a toll, a tire, or the annual insurance renewal. That is why a cheap fuel month can still be an expensive ownership month.
RPMBase keeps those amounts on the car expense tracker, next to fuel and maintenance, without mixing the three into one vague pile.
Car expenses that belong in the log
Insurance and the registration or road tax, on the date you paid them. Parking and tolls if you want the true cost of using the car, not only the cost of keeping it legal.
Tires, a battery, and repairs, when you want them in the yearly total. If the same visit is already a maintenance row with a cost, do not enter that total again as an expense. One bill, one place.
Cleaning and small accessories are optional. Include them if you want every cash leaving for this car. Leave them out if you only want the bills you would still pay if you drove less.
What to keep out of the car expense log
Fuel belongs in the fuel tracker. Fill-ups have liters or gallons, a price, and an odometer. An expense row cannot do that job.
Oil changes, filters, and brake jobs belong in the maintenance log, with the kilometers. The cost is still part of ownership. It does not need a second copy.
Fines are a choice. Include them for a true cash picture. Leave them out if you want the cost of the car rather than the cost of a mistake. Depreciation and loan interest are a different question. The ownership cost guide keeps them out of the simple sum.
One car, one set of bills
A shared insurance policy needs a split you can explain, or the comparison between two cars is theater. Log each vehicle's share on that vehicle.
The cost per kilometer tool can total a year from the bills you have today. The app is where those amounts stay attached to the car after the afternoon is over.
Free in RPMBase covers one car with unlimited expense rows. Premium is for more cars, billed in the App Store or Google Play. Enter the amount you paid, in the currency you paid.
How this helps later
A year of named expenses answers whether the second car is actually cheaper, and whether insurance or tires moved the total. It does not set a resale price.
If you are still deciding between a sheet and an app, the spreadsheet comparison is about the maintenance log. The same split applies here: a table works until two cars and a pile of categories get messy.