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Vehicle Service Budget and Interval Calculator

Total entered annual service quotes and check a recorded mileage or calendar interval against the current odometer and date.

Use this result well

Inputs that matter
Annual service list: name | occurrences | USD each, Expected annual miles, Extra allowance per mile (USD), Additional annual repair reserve (USD), and 8 more
Output to expect
Annual service budget, Entered service interval
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Unit Price

Reference & details

How it works

Annual work list

Use your actual planned work and current quotes. The additional mileage allowance must cover different costs so tires, labor or fluids are not counted twice.

Annual budget = sum(occurrences × unit cost) + annual miles × extra cost/mile + reserve

Mileage and calendar limits

Dates use YYYY-MM-DD. End-of-month calendar addition clamps to the target month’s last day. A reached limit is due even if the other limit is still in the future.

Due = current mileage ≥ last mileage + interval OR as-of date ≥ last date + calendar months

Optional mileage date

A future mileage date assumes constant annual miles and 365 days/year. Zero annual mileage or an estimate beyond year 9999 leaves that date unestimated.

Days to mileage limit = remaining miles ÷ annual miles × 365

Updated: September 2026

Example Scenarios

Oil service twice at $80, inspection once at $50, 12,000 miles at $0.02 extra per mile and a $300 reserve.

→ $750/year, or $62.50/month toward this budget.

Last service at 20,000 miles on March 1, 2026; entered limits of 5,000 miles or 12 months; current 24,000 miles on September 1.

→ Next thresholds are 25,000 miles and March 1, 2027; neither has yet been reached.

Common Mistakes to Avoid

Applying the illustrative interval to every vehicle

Use the exact service item and normal/severe-use schedule from the correct manual.

Treating a reserve as a predicted repair bill

Keep the chosen allowance separate from quoted work and update it with actual records.

FAQ

Enter one line per item as name | whole occurrences | USD each, up to 50 complete lines. Zero occurrences are allowed. Correct missing or malformed values instead of silently dropping a line.

Either enabled threshold can make it due: the last service mileage plus the mileage interval, or the last service date plus calendar months. Zero disables that threshold; at least one must be enabled.

No. It stores a local case. Put the verified due date and mileage in your own calendar or service record, and check symptoms and recalls separately.

Use Save planning case to store the completed inputs and result in this browser. Copy MD includes the inputs and interpretation; Download CSV contains the result breakdown. Keep copied Markdown separately for a portable record. Editing a case requires saving again; browser history is not cloud backup.

About Vehicle Service Budget and Interval Calculator

Use Annual service budget for a quoted work list and separate allowances. Use Entered service interval to check one actual manufacturer requirement against your service record. The tool supplies no universal oil interval, age multiplier or repair forecast.