Calculate ongoing costs such as maintenance, insurance, taxes, fees, fuel, utilities, subscriptions, and repairs before buying.
By the end of this upgrade you will have a full itemized total cost of ownership for a specific purchase before you commit to buying it.
Identify all categories that apply: financing/interest, insurance, taxes/fees, maintenance/repairs, consumables (fuel, utilities), subscriptions, and storage.
Replace estimates with actual quotes where possible (insurance quote, published tax rates, manufacturer maintenance schedules) rather than assuming costs will be minimal.
Convert irregular costs (annual registration, periodic maintenance) into a monthly reserve figure so they can be compared on the same basis as the purchase payment.
Monthly reserve for irregular cost = annual estimated cost / 12
Add financing payment, insurance, taxes/fees monthly share, maintenance reserve, and consumables to get one all-in monthly figure.
TCO per month = payment + insurance + taxes/fees ÷12 + maintenance reserve + consumables + subscriptions
Multiply the monthly TCO by the number of months you expect to own the item, and add the purchase price minus expected resale value, to see lifetime cost.
Lifetime cost = purchase price − expected resale value + (TCO per month x months held)
Compare the lifetime and monthly TCO figures against your budget ceiling and against at least one lower-cost alternative before deciding.
Revisit when