OK, it was a trick question: Although many people are looking for the cheapest place to file for bankruptcy, the filing fees are the same no matter where you file. Currently, you have to pay a filing fee of $335 to file a Chapter 7 bankruptcy case and $310 to file under Chapter 13.
Generally, you must file your bankruptcy case in the judicial district and state where you live or have your domicile. Your domicile is kind of like your permanent residence: It's the place where you receive mail, are registered to vote, get your driver's license, and intend to live permanently, even if you are temporarily living elsewhere (for example, you are posted overseas for business or have been deployed to military service in another country).
Some states have only one bankruptcy district; others have two, three, or four districts. To find the closest bankruptcy court, go to Bankruptcy in Your State and select your state from the list. There, you'll find information on your state's bankruptcy courts, including links to each district's website.
If you can't afford to pay the whole filing fee at once, you can ask the court to allow you to pay in installments. You make this request by filing Bankruptcy Form 3A: Application to Pay Filing Fee in Installments. You can ask to pay in up to four installments, with the final installment due no later than 120 days after you file your bankruptcy petition. The court can extend this deadline by 60 days if you have good reason, but your case may be dismissed if you haven't paid the full fee by 180 days after you initially file the petition.
If you plan to file for Chapter 7 bankruptcy, you can ask the court to waive the fee altogether by filing Bankruptcy Form 3B: Application for Waiver of the Chapter 7 Filing Fee for Individuals Who Cannot Pay the Filing Fee in Full or in Installments. To complete the form, you'll have to provide detailed information about your income, expenses, and other financial matters.
You can't apply for a fee waiver in a Chapter 13 bankruptcy case. In Chapter 13, you have to repay your debts over time by coming up with a repayment plan and making monthly payments that the trustee will distribute among your creditors. If you can't come up with the filing fee, the court is unlikely to believe that you'll be able to make your required plan payments.