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Software Seats & Contract Cost Calculator

Calculate discounted monthly, annual and total subscription costs.

  • Formula & worked example
  • Private in your browser
  • No signup
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Edit a calculated value to solve backwards, or lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Results are estimates for planning and education. Confirm rates, taxes, fees, and legal requirements with the relevant institution or a qualified professional before making a financial decision.

Formula and method

Ten seats priced at 50 per seat each month with a 20% discount cost 400 monthly and 4,800 annually. A two-year contract totals 9,600.

Monthly cost = seats × monthly seat price × (1 − discount); total contract cost = monthly cost × months

Worked example

Enter these known values and leave the other values blank.

Monthly price per seat
50 USD
Seats
10
Discount
20 %
Contract duration
2:0 yrs / mos
Monthly discount per seat
10 USD
Discounted price
40 USD
Monthly cost
400 USD
Annual cost
4800 USD
Contract value
9600 USD

Assumptions and limitations

  • The discount amount is per seat per month in this model. Seat counts and prices stay constant; one-time charges, usage fees, taxes, billing proration and price increases are not included. Enter years and months as years:months when that unit is selected.
  • Use consistent periods, currency and accounting definitions. The result follows the stated formula and the figures you supply.

Common questions

Is the fixed discount applied once to the whole contract?

The discount amount is per seat per month in this model. Seat counts and prices stay constant; one-time charges, usage fees, taxes, billing proration and price increases are not included. Enter years and months as years:months when that unit is selected.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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