Interest and Fees a Debt Collector Can Legally Collect

What restrictions apply to interest and fees that a debt collector can collect? The rule, according to the Consumer Financial Protection Bureau (CFPB), is direct: a debt collector may not collect any interest or fee not authorized by the agreement or by law.

This article explains exactly when collection agencies can charge interest, when debt collectors cannot add new interest or other charges, how to verify what you actually owe, and what to do if a collector sues you. It is written for Colorado borrowers — including the many military families around Colorado Springs — who are dealing with an unpaid debt and want to protect their finances and their path to a future home purchase.

The short answer: only what the agreement or the law allows

A debt collector cannot invent interest or fees. Every charge added to the original debt must trace back to one of two sources: the original agreement you signed, or a law that expressly permits the charge.

Here are the core restrictions in plain terms:

• Debt collectors cannot collect any interest or fee not authorized by the agreement or by law.
• The interest rate or fees on a debt may be increased only if the original loan or credit agreement permits it and no law prohibits the increase.
• Alternatively, interest or fees may be added if state law expressly permits them.
• State law may also limit the amount of interest charged.
• Debt collectors are not allowed to apply a single payment across multiple debts that you are disputing.

That framework applies whether the account started as credit card debt, medical bills, or personal loans. The next question is who these rules actually cover.

Who do these debt collection rules apply to?

The protections discussed here come from federal consumer financial law, including the Fair Debt Collection Practices Act (FDCPA), which governs how debt collectors can behave when they contact you about an unpaid debt.

Original creditor vs. debt collector

The original creditor is the company you first borrowed from or owed money to. Debt collection agencies typically enter the picture later, collecting on behalf of a creditor or after buying the debt.

One practical difference the CFPB points out: you may have more room to negotiate with a debt collector than you did with the original creditor. That matters when you get to the payment plan stage.

Why this matters in Colorado Springs

Collection activity follows people through life changes, and few communities move more than military ones.

With the players defined, let’s look at exactly when collection agencies charge interest legally.

When can collection agencies charge interest or fees?

Collection agencies charge interest lawfully only in specific situations. Some state laws and some contracts allow interest to be charged and costs to be added — but the authorization has to actually exist.

When the original contract permits it

If the original agreement you signed allows interest to accrue or permits certain fees, a collector can generally continue collecting under those terms, as long as no law prohibits it. If you still have the original contract, it may say what interest rate can be charged or how much it can increase.

This is why digging out the original agreement is step one. The contract is the primary evidence of what the collector is allowed to add to the original debt.

When state law expressly permits it

Even without contract language, interest or fees may be collected if state law expressly permits the interest or fee. State law works in both directions here: it can authorize charges, and it can limit the amount of interest charged.

When debt collectors cannot add interest or fees

If neither the original agreement nor the law authorizes a charge, the collector cannot collect it. Period. New interest, added costs, or other charges that appear out of nowhere on a collection notice deserve scrutiny — and you have tools to demand an explanation.

Situation	Can the collector collect the interest or fee?
Original agreement permits it and no law prohibits it	Yes
State law expressly permits the interest or fee	Yes
Not authorized by the agreement or by law	No — debt collectors cannot collect it

Knowing the rules is one thing; verifying what a specific collector is charging is the next.

How do I verify the interest and fees on a debt?

Before you pay anything, confirm that you owe the debt and that the amount — including any interest charged — is accurate.

Request validation information

When debt collectors contact you, they must give you certain information about the debt they say you owe, or provide it within five days of first communicating with you. Generally, this must come in writing, either in the mail or electronically.

This validation information helps you figure out whether you owe the debt and explains how to dispute the debt if you don’t. If you’re unsure who you owe money to or how much you owe, you can request that the debt collector provide more information.

Pull out the original agreement

Compare the collector’s figures against the original contract. If the contract specifies how interest can accrue or increase, the collector’s math should line up with it.

Use the CFPB sample letters

The CFPB has prepared sample letters consumers can use to respond to a debt collector, with tips on how to use them. One sample letter requests information about why the interest rate was increased. Another is designed to stop or limit further communication from the collector.

Always keep a copy of your letter for your records. Written verification and a paper trail are your best defense if the dispute escalates. You can read the CFPB’s guidance directly at Can a debt collector increase the interest rate on a debt I owe?

Sometimes a dispute does escalate — into a lawsuit. Here’s what the restrictions look like once a court gets involved.

What happens if a debt collector sues me?

If you’re sued for an unpaid debt, respond to the lawsuit — personally or through a lawyer — by the date specified in the court papers. Read the lawsuit carefully and meet the required deadlines.

Why responding matters

When you respond, the debt collector has to prove to the court that the debt is valid. Responding doesn’t mean you agree that you owe the debt or that it’s valid; it preserves your ability to fight the claim or negotiate.

If you don’t respond, the court could enter a default judgment against you — likely for the amount the collector claims you owe, plus lawful additional fees to cover collection costs, interest, and attorney fees as allowed by the judgment.

What a judgment allows collectors to do

A judgment gives debt collectors much stronger tools. Depending on your situation and state law, a creditor with a judgment may be able to garnish your wages, place a lien against your property, or move to freeze funds in your bank account.

A judgment is a court order, so it can be very difficult to change or set aside once the case is over. You also may lose the ability to dispute the debt or challenge the amount. The CFPB’s full guidance is at What should I do if I’m sued by a debt collector or creditor?

When collectors cannot sue or threaten to sue

Under the FDCPA, a debt collector can’t use the threat of a lawsuit to collect a debt if they don’t intend to file one. Debt collectors also cannot sue or threaten to sue after the statute of limitations — the period of time they have to file a lawsuit to collect a debt — has expired.

If a lawsuit isn’t on the table yet, negotiation usually is. Here’s how the CFPB says to approach it.

Can I negotiate the interest, fees, and balance?

Yes. The CFPB lays out a three-step approach for working out a settlement or repayment agreement with a debt collector.

Step one: confirm you owe the debt

Use the validation information to verify the debt and the amounts before agreeing to anything. If something is wrong, dispute the debt rather than paying it.

Step two: calculate a realistic payment plan

Review your monthly take-home pay and expenses, and decide what you can realistically pay each month — leaving room for unexpected expenses. Falling behind on other bills while paying off this debt can create bigger problems.

If you have more than one debt with a collector, you can direct the collector to apply payments to a specific debt. Debt collectors cannot apply a single payment to multiple debts you’re disputing.

Step three: make the proposal and get it in writing

Explain your financial situation and make your offer. If you agree to a repayment or settlement plan, get the plan and the collector’s promises in writing before you make a payment — including promises to stop collection efforts or forgive the debt once the plan is complete.

One caution from the CFPB: avoid companies that charge money in advance to settle your debts for you. Some debt settlement companies promise more than they can deliver, and certain creditors may refuse to work with them. A non-profit credit counselor can help you build a budget and work with collectors instead. The full negotiation guide is at How do I negotiate a settlement with a debt collector?

Negotiation also happens inside a set of behavioral rules collectors must follow — worth knowing before you pick up the phone.

What else can’t debt collectors do?

The FDCPA prohibits debt collectors from placing repeated or continuous telephone calls or conversations with the intent to harass, oppress, or abuse you. Harassment and other unfair practices are off-limits.

You can also use a CFPB sample letter to stop or limit further communication from a collector. And if a collector crosses the line, you can submit a complaint with the CFPB.

For military families in the Pikes Peak region, there’s an additional layer of help available on post.

Where can military borrowers in Colorado Springs get help?

If you’re a servicemember facing debt collection or a collection lawsuit, the CFPB recommends consulting your local JAG office or using the JAG Legal Assistance Office locator. Your installation’s financial readiness office is another resource for information.

Civilians have options too. Some attorneys offer free services or reduced fees, and legal aid offices or legal clinics may offer free help if you meet their criteria. Look for an attorney with experience in the FDCPA and debt collection issues — free legal help exists if you know where to ask.

Resolving collection issues isn’t just about the debt itself. It also clears the path toward bigger goals, like homeownership.

Your next step

Start by requesting written validation of the debt, then compare every interest charge and fee against the original agreement and your state’s law. Dispute anything that isn’t authorized, respond to any lawsuit by the deadline, and get every settlement promise in writing.

If old collection accounts have been standing between you and a home purchase in Colorado Springs, talk to a loan officer at 719 Lending about where your credit report stands today and what a realistic path to a mortgage looks like. Resolving a debt the right way — with documentation — is a concrete step toward that goal.

Frequently asked questions

Can a debt collector increase the interest rate on a debt I owe?

Only in limited cases. The interest rate or fees may be increased if the original loan or credit agreement permits it and no law prohibits the increase, or if state law expressly permits the interest or fee. A debt collector may not collect any interest or fee not authorized by the agreement or by law.

Can collection agencies charge interest on medical bills or credit card debt?

The same rule applies to any debt type: collection agencies can charge interest only if the original agreement allows it and no law prohibits it, or if state law expressly permits the charge. State law may also limit the amount of interest charged.

How do I dispute interest or fees a debt collector added?

Request written validation of the debt, compare the charges against your original contract, and use the CFPB’s sample letters — including one that requests information about why the interest rate was increased. Keep a copy of every letter for your records.

Can a debt collector garnish my wages or freeze my bank account?

Generally only after winning a court judgment. Depending on your situation and your state’s laws, a creditor with a judgment may be able to garnish your wages, place a lien against your property, or move to freeze funds in your bank account. That’s why responding to any lawsuit by the deadline is critical.

What should I do if a debt collector sues me?

Respond to the lawsuit, personally or through a lawyer, by the date in the court papers. Responding forces the collector to prove the debt is valid and preserves your right to dispute it or negotiate. Ignoring the suit risks a default judgment for the claimed amount plus lawful collection costs, interest, and attorney fees.

Where can servicemembers get free legal help with debt collection?

The CFPB recommends consulting your local JAG office or using the JAG Legal Assistance Office locator, and asking your installation’s financial readiness office for information. Legal aid offices and legal clinics may also offer free help if you meet their criteria.

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719 Lending Inc. is not affiliated with or endorsed by HUD, FHA, VA, USDA, CHFA, the CFPB, or any government agency.

Last updated: October 2026