CompareForgecalculate tool
Total Cost of Ownership Calculator
Compare buy, subscribe and lease options over 1, 3 or 5 years by totalling upfront, recurring and periodic costs for each path.
How This Tool Works
Each option is totaled over the horizon you choose: upfront cost, plus monthly recurring × months, plus annual one-offs × years. The totals are ranked and converted to monthly equivalents so you can compare cash-flow shapes as well as bottom lines.
Common setups are buy versus subscribe (purchase price against a monthly fee) versus lease (upfront deposit plus monthly payments). A third option can model a hybrid path such as buying refurbished.
How to Use It
Name each path, then enter its real numbers. A pure purchase typically has a large upfront cost and small recurring amounts (insurance, accessories). A subscription flips that shape: little or nothing up front, steady monthly cost.
Pick the horizon that matches how long you would actually use the thing — 1 year for a trial period, 3 years for typical electronics, 5 years for appliances or vehicles.
Understanding the Results
The cheapest total wins over your chosen horizon, but the horizon is a lever: a subscription that beats a purchase over one year may lose over five. Run the tool at multiple horizons to see where the lines cross.
Monthly equivalents matter for budgeting — an option with the lowest total but a heavy upfront payment can still be the wrong choice if cash flow is tight.
Example
Software that can be bought outright for $899 with $49/year updates, or subscribed at $29.99/month with no upfront cost, over 3 years (36 months).
Buy: $899 + ($49 × 3) = $1,046. Subscribe: $29.99 × 36 = $1,079.64. Buying is $33.64 cheaper over three years — but the subscription needed only $0 up front and can be cancelled. Extend the horizon to 5 years and buying pulls clearly ahead.
Important Considerations
The model assumes prices stay flat. Subscriptions often rise; purchases rarely do — if you know a planned increase, model it manually by adjusting the monthly figure to an average.
Interest, financing fees, resale value and tax differences are not included. Subtract expected resale from a purchase’s upfront cost if you will sell at the end.
This is a cost model, not advice. Convenience, flexibility and ownership benefits are yours to weigh.
Methodology & Data
- Total = upfront + (monthly × months) + (annual × years) per option over the selected horizon.
- Monthly equivalent = total ÷ months. Options are ranked by total cost.
- Options with no entered costs are skipped; at least two options are required.
- Costs are assumed constant over the horizon; no inflation, interest or resale modeling.
- All figures come from user inputs — no live pricing is fetched.
Related Tools
Related Guides
- How to Compare Subscription Plans Properly
A repeatable method for comparing subscription tiers - normalize billing periods, weight the features you use, and catch pricing traps.
- Building a Weighted Decision Matrix That Works
How to build a weighted decision matrix: define criteria, set weights honestly, score options consistently, and read the result without fooling yourself.
Common Questions
What does total cost of ownership mean?
It is the full cost of an option over a period of time: the upfront price plus every recurring and periodic cost you incur while owning or using it.
How do I compare buying versus subscribing?
Enter the purchase price and its ongoing costs as one option, and the subscription’s upfront and monthly fees as the other, then choose a horizon. The tool totals and ranks both.
What horizon should I choose?
How long you would genuinely use the thing. Short horizons favor subscriptions; long horizons usually favor purchases. Testing 1, 3 and 5 years shows where the balance tips.
Does the calculator include interest or financing?
No. Enter cash prices. If you are financing, add the interest to the upfront cost or spread it into the monthly figure so it is included in the total.
Can I model resale value?
Yes — subtract the expected resale amount from the purchase option’s upfront cost before entering it, since that money returns to you at the end of the horizon.