Estimate monthly and annual mobile phone plan cost from line charges, device payments, taxes, and one-time fees. Use the editable assumptions to test a current routine, compare alternatives, and see the annual effect without building a separate spreadsheet.
Fill in Number of lines, Service cost per line.
Complete the remaining fields so the estimate reflects your normal pattern.
The calculator updates automatically after each input change.
Change one assumption at a time to see how the main total and breakdown respond.
Use Reset to restore the original example values.
Ongoing monthly cost = number of lines × service cost per line + device payments + monthly taxes and fees. First-year cost = monthly cost × 12 + one-time setup cost.
The first-year result includes recurring service and device charges plus setup costs.
Promotional credits, data overages, roaming, and future device payoff changes are not automatically modeled.
Given: two lines at $45 each, $50 in device payments, $12 in taxes and fees, and a $60 setup charge. Calculation: 2 × $45 + $50 + $12 = $152 per month; $152 × 12 + $60 = $1,884. Result: estimated first-year cost is $1,884.
Enter the combined monthly device payment for all lines.
Use the recurring billed amount for surcharges, regulatory fees, and taxes.
Subtract a recurring discount from the service cost or fees before entering the amount.
It excludes the one-time setup cost but still includes the entered device payments.
Run each plan using the same line count and comparable device assumptions, then compare totals.