Monthly subscription costs can add up quickly. Most people think their bills are an all-or-nothing situation: You either have the budget to pay the monthly fee or you cancel the service. But new data from personal finance app Truebill suggests that many companies are willing to negotiate with customers for a lower monthly rate so as not lose subscriptions.

Online financial marketplace LendEDU collected the data from Truebill, which got its numbers by running a minimum of 100 negotiation attempts for each service provider on the graph. Negotiating for a lower monthly rate comes with varying degrees of success, as the results show. Besides one's natural ability to haggle for a bargain, certain companies are simply more receptive to working out a deal with customers than others.

At the top of the list is radio streaming company SiriusXM, with over 80 percent of customers successfully negotiating a lower monthly bill. Directly behind that were internet providers SuddenLink and CenturyLink and satellite TV provider Dish Network.

On the opposite end of the spectrum were two of the "big four" carriers. T-Mobile was least willing to work with customers, with only a 10-to-19-percent success rate on negotiations. Slightly better was Verizon's Residential internet service provider Fios, which successfully negotiated with 30 to 39 percent of customers.

So you called your cable company, waited on hold for an hour, and finally are connected to a human customer service rep who's willing to negotiate. How much can you chop from the bill?

Again, it depends on the company and its willingness to move the mark, but SiriusXM came up in first place yet again, offering on average a price reduction of 40 percent or more. CenturyLink, DirecTV, and security company ADT all followed closely behind, negotiating 25-to-29-percent price reductions.

Perhaps unsurprisingly, more of the big four carriers landed in the bottom spots again, with Verizon and AT&T both agreeing to only 10-to-14-percent price reductions for successful negotiations.

An interesting point of reference was ISP Suddenlink's position in the bottom of this graph, implying that the company is not stingy with approving reduced rates but that the discounts they do give are relatively small.

Ultimately, your success with negotiating lower monthly service charges is likely to be affected by your tenure with the company and how much you're currently paying. And having a good case to present doesn't hurt, as cable companies know that they're losing customers to streaming services.

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