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The price for service listed on wireless companies’ website is rarely the one you end up paying at the end of the month.

For starters, there are federally mandated charges, plus state and local taxes -- as well as surcharges imposed by the carriers as a way to recover the costs of divvying up the money to the required agencies. In fact, there are over 75 different “fees” your carrier can charge, according to wireless comparison site ABTolls.com, and the average U.S. wireless customer pays nearly 18% in federal, state and local fees, according to a November 2015 report by the Tax Foundation.

These extra charges on the rise. The tax rate on cell phone bills has increased nearly three percentage points since 2008, even as the size of the average monthly bill has fallen, the Tax Foundation found. “Taxes on wireless have far exceeded the normal scale, says Kae Zulager, CEO of BillPolice, a service that manages and optimize wireless charges.

Then there are surcharges and fees -- items not required by law, but which are charged to the carrier -- the federal Universal Service Fund, say -- and often passed along to consumers as an extra fee.

Are you stuck with them? In some cases, Zulager says, BillPolice has been able to negotiate a credit on some administrative fees. But the best way to reduce the amount of fees you pay is just to lower your overall spending, she says. “The lower your bill, the lower your taxes are going to be, because a lot of them are based off a percentage of your service charges.”

The first step is knowing exactly what you're paying. Money gathered staffers' bills from the last month to show you where these fees are hiding on your cell phone bill.

1. Universal Service Fund Fee

All providers must contribute to the federal Universal Service Fund, which funds initiatives such as the Connect America Fund, Lifeline and E-rate, according to the FCC. But while prepaid service providers like Cricket and MetroPCS absorb the cost, the Big Four carriers (AT&T, Sprint, T-Mobile, and Verizon) pass that cost along to you. Wireless customers pay about $5 billion annually in Federal Universal Service Fund surcharges, the Tax Foundation estimates. The FCC regulates this charge and adjusts the fee quarterly based on the fund’s current balance.

2. State Taxes

These taxes are billed to your primary “usage place,” Zulager says -- generally your residence or business address. But if you’ve moved out of state and kept your number, check with your carrier to see if they've updated your bill. “Sometimes if they don’t upgrade a tax code, you may be getting taxed incorrectly,” Zulager says. That could make a difference if you’ve moved to a state with lower taxes.

3. State Telecommunications Excise Surcharge

Many states, New York among them, levy specific sales and excise taxes on telecommunications services. Overall, customers in New York state pay an average of 24.36% in federal, state and local taxes on their wireless bills, according to the Tax Foundation.

4. 911/Emergency Response Fees

The carriers are authorized (and at times, required) to collect these fees from customers to help local governments pay for emergency services such as fire and rescue. The fees are generally billed as either an amount per telephone access line or a percentage of revenue. The National Emergency Number Association has a state-by-state guide.

5. Regulatory Charge

Despite the name, regulatory charges are not government-mandated. Instead, they are surcharges that you get charged to help the carrier defray the costs of federal, state and local regulations. At T-Mobile, this is billed as the “Regulatory Programs & Telco Recovery Fee,” and covers fees like local number portability, government programs, and charges imposed by other carriers for the delivery of calls.

6. Administrative Charge

Administrative charges are similar to the regulatory charges, but more nebulous. They’re generally billed as fees used to cover the costs paid to other carriers when talking to someone on a different network. AT&T’s $0.61 fee, rolled out in 2013, also goes toward “charges associated with cell site rents and maintenance.” These fees can (and do) change from time to time.

U.S. lawmakers have proposed bills like the Wireless Tax Fairness Act and the Digital Goods and Services Tax Fairness Act, aimed at curbing some of the excessive fees and surcharges -- but neither has gotten much traction.

7. City Taxes & Fees

Cities and counties can also add taxes that inflate your bill. There about 12 states in which local governments charge some type of local tax or fee, many of which are legacy taxes established for landline services that have been extended to wireless services. For example, New York City charges the MTA Telecom Surcharge, which is a 0.375% tax that applies in to New York metropolitan area residents.

8. Gross Receipts Surcharge

These fees -- which stem from the taxes that some states, counties and cities impose on the carriers’ total revenue -- can range dramatically. The Tax Foundation found that states like Pennsylvania and Rhode Island charge a 5% state gross receipts tax, while New Mexico charges a 5.13% state tax and an additional 2.62% in certain cities and counties, and many carriers pass this along to users.

Sick of your cell phone plan? Try finding a new one using Money's exclusive cell phone plan tool below. And if you're looking for more information, check out The Best Cell Phone Plans of 2016.