Monthly Bill Change Calculator
Compare an older monthly bill with the current amount. See the dollar difference, percentage change and recurring cost over a period you choose.
Calculate my bill change →FREE BILL TOOLS
Understand the math before you change a bill
Use these free browser-based tools to measure a bill increase, compare negotiation fees and prepare a provider call. Start with the numbers, then decide what action makes sense.
Bill Negotiation Fee Calculator
Model a percentage-based negotiation fee and see gross savings, estimated service fee and the savings you would keep.
Open fee calculator →Internet Bill Negotiation Script
Build a provider-specific script using your current bill, plan, customer tenure and a real competing offer.
Build internet script →Phone Bill Negotiation Script
Prepare a wireless-provider call using your real bill, lines, device payments and a verified competing offer.
Build phone script →Cable Bill Negotiation Script
Review package price, equipment, add-ons and promotions before you call the cable provider.
Build cable script →Billing Error Dispute Letter
Create a factual message asking a provider to explain or correct a charge without entering sensitive account information.
Build dispute message →Late Fee Waiver Request
Create a polite one-time courtesy waiver request and confirm your future payment settings.
Build waiver request →Bill Negotiation Script Generator
Create a call outline for internet, cable, mobile or another recurring service. Your inputs stay in the browser.
Build my script →Compare Two Bills Line by Line
Paste verified line items from an older and newer bill to identify changed charges, missing credits and total differences locally in your browser.
Compare two bills →Did the Promised Savings Arrive?
Record the agreed recurring price and compare it with the next bill so a one-time credit is not mistaken for recurring savings.
Check promised savings →AI Bill Checker
Use a structured workflow to identify recurring charges, price increases, lost discounts and items worth reviewing before contacting the provider.
Open bill checker →Hidden Fee Checklist
Start with the exact fee label, compare prior statements and separate recurring provider charges from one-time items.
Review hidden fees →Which tool should I use first?
- My bill went up: start with the Monthly Bill Change Calculator.
- I may pay a negotiation service: use the Negotiation Fee Calculator before enrolling.
- I want to call the provider myself: use the general, internet, phone or cable Script Generator.
- I think a charge is wrong: use the Billing Error Dispute Letter template.
- I want to ask for a one-time late fee waiver: use the Late Fee Waiver Request.
- I want to compare an old and new bill: use Compare Two Bills Line by Line.
- I already negotiated a lower price: use the Savings Follow-Up tool when the next bill arrives.
- I do not know what changed: start with the AI Bill Checker or the guide hub.
- I see an unfamiliar fee: use the Hidden Fee Checklist and then the matching fee guide.
Why the tools are separate
A bill increase, a negotiation-service fee and a provider call are different problems. Separating them keeps the math transparent and makes it easier to verify each step against the actual bill and provider terms.
These tools do not decide that a charge is wrong and do not guarantee a lower bill. They are designed to help you ask better questions and compare recurring costs more clearly.