How this calculator works
Percentage change plus the extra cost over a year — the number to have ready before calling to negotiate or cancel.
- Percentage change = |new − old| ÷ old × 100.
- Extra per year = (new − old) × 12 for monthly bills, or new − old for yearly bills.
Worked example
With these inputs: old amount $79.99; new amount $94.99; billed Monthly.
The result is increase 18.8%, with extra per year $180.00 and extra per month $15.00.
How to push back on a price increase
Call the provider's retention or cancellation line, not general support. Have three things ready: how long you've been a customer, the exact increase (from this calculator), and a competitor's price for the same service. Ask for the previous rate or a promotional rate. If they say no, ask what plans are cheaper.
Insurance renewals are worth comparing against other insurers every year. Rent increases may be subject to local rules, so check them before you sign a renewal. The rent increase calculator turns a renewal offer into the percentage and the extra cost per year, so you know exactly what you're negotiating.
Frequently asked questions
How do I calculate a percentage increase?
Subtract the old amount from the new amount, divide by the old amount, and multiply by 100. From $79.99 to $94.99 is an 18.8% increase.
How much will a price increase cost me per year?
For a monthly bill, multiply the monthly difference by 12. The calculator also shows five years.
How do I notice price increases?
Track every bill with its current amount. When a bill arrives at a different amount, updating it in a bill tracker makes the change obvious.