An overdraft line of credit is a revolving loan linked to your checking account that automatically covers transactions when your balance drops below zero. Instead of charging a flat fee each time you overdraw, the bank lends you exactly enough to bring the account back to zero and charges interest on that borrowed amount until you repay it. Credit limits typically run from a few hundred dollars to several thousand, depending on your credit profile and the bank’s policies, and for small, short-lived shortfalls the interest cost is usually a fraction of a single standard overdraft fee.
How It Works
When a transaction would take your checking account negative, the credit line activates on its own. The bank moves exactly enough over to zero out the account, and that transferred amount becomes a loan balance that starts accruing interest immediately. You repay it over time, similar to a credit card.
The line is revolving. If your limit is $2,000 and you borrow $300 to cover an overdraft, $1,700 remains available for the next shortfall. As you repay, that capacity refills. You don’t reapply each time.
Because this is a formal credit product, it falls under Regulation Z of the Truth in Lending Act rather than the Regulation E rules that govern standard overdraft coverage.1eCFR. 12 CFR 1005.17 – Requirements for Overdraft Services The bank has to disclose the interest rate, all fees, and the repayment terms in writing before you sign up.
How It Compares to Standard Overdraft Coverage
Both products keep transactions from bouncing, but the pricing works in opposite ways.
Standard overdraft coverage charges a flat fee per overdraft. That fee has historically hovered around $35, though many large banks have cut it to $10 or $15 in recent years.2FDIC.gov. Overdraft and Account Fees The fee hits whether you overdraw by $5 or $500, and several fees can stack up in a single day if multiple transactions clear against a negative balance. Some banks add a daily fee for each day the account stays overdrawn.
An overdraft line of credit charges interest instead. Overdraw by $100 at a 15% APR and repay it within a week, and you’d owe roughly 29 cents in interest. Even with a transfer fee added, the total is a fraction of one flat overdraft charge. That gap shrinks if your bank has already reduced its overdraft fee, but for most people the credit line still comes out cheaper on occasional, short-term shortfalls.
There’s also a regulatory difference. Standard overdraft coverage for debit card and ATM transactions requires you to opt in before the bank can charge fees; without opt-in, those transactions are simply declined.1eCFR. 12 CFR 1005.17 – Requirements for Overdraft Services An overdraft line of credit is a separate credit agreement you apply for, so the opt-in rule doesn’t apply to it. The opt-in rule also doesn’t cover checks or recurring automatic payments, which banks can overdraw and charge on without asking.3Federal Register. Consumer Financial Protection Circular 2024-05 – Improper Overdraft Opt-In Practices An overdraft line of credit covers all transaction types.
What It Costs
Three charges may apply: interest, transfer fees, and sometimes a maintenance fee.
Interest is the main cost. The APR is variable and typically runs in the range you’d expect for an unsecured personal line of credit, roughly 10% to 21%, depending on your credit and the bank. Interest accrues daily on your outstanding balance, so paying quickly matters.
Transfer fees apply at some banks every time the line activates. These commonly run $5 to $12 per transfer. Some banks charge a flat daily fee instead, and a few charge nothing, leaving interest as the only cost.
Annual or monthly maintenance fees are less common but do exist. Some banks charge a modest amount just to keep the line open whether you use it or not. Others waive it.
Repayment mirrors a credit card. You owe a minimum monthly payment, usually the greater of a small fixed dollar amount or a percentage of the outstanding balance plus accrued interest. You can pay more or clear the full balance at any time without penalty, which stops interest immediately. Carrying a balance month after month is where the cost starts to look like credit card debt.
How to Get One
An overdraft line of credit isn’t a default checking account feature. You apply for it separately, and the process resembles applying for a credit card.
The bank runs a hard credit inquiry, which can temporarily drop your credit score by a few points. You’ll typically need proof of income and a reasonably solid credit history. The bank uses that information to decide whether to approve you and to set your limit. You also need a checking account at the same institution, since the point is to link the credit line directly to that account.
Some banks add requirements like a minimum average balance or an established relationship. If your credit is thin or your income is uneven, approval isn’t guaranteed. This is where the credit line differs most sharply from standard overdraft coverage, which requires no credit check and is available to anyone who opts in.
How It Affects Your Credit Score
Beyond the hard inquiry at application, an overdraft line of credit stays on your credit report as a revolving credit account, listed alongside your credit cards.
Your balance factors into your credit utilization ratio, the percentage of available revolving credit you’re using. A high balance relative to the limit pushes utilization up and can lower your score. An open line with a zero balance does the opposite: it adds to your total available credit and can improve your utilization the same way an unused credit card with a high limit does.
Payment history matters too. Making at least the minimum payment on time each month helps your credit; missing payments hurts, and the damage compounds each month. A seriously delinquent line that gets charged off stays on your credit report for seven years.
What Happens if You Don’t Repay
Falling behind on an overdraft line of credit carries consequences beyond credit damage.
Your bank has a legal right called right of offset. It can pull money from your other accounts at the same institution, including savings, certificates of deposit, and even a joint checking account, to cover missed payments. This can happen with little warning. Federal law protects tax-deferred retirement accounts like IRAs from this practice, and some states impose their own limits on how aggressively banks can use it.
If the debt stays unpaid long enough, the bank will charge off the account and may close your checking account with it. That closure can be reported to ChexSystems, a specialty consumer reporting agency most banks check before opening new accounts. A negative ChexSystems record generally lasts five years and makes opening a checking or savings account elsewhere very difficult during that period.
Joint account holders face particular exposure. If two people share the checking account linked to the credit line, both can be held responsible for the debt, even if only one caused the overdraft. Courts have reached conflicting conclusions on this, so the specific language in your account agreement matters. Read it before assuming only the spender is on the hook.
Alternatives Worth Considering
An overdraft line of credit isn’t the only way to avoid overdraft fees. A few other options may fit better depending on your situation.
- A linked savings account. Many banks let you link savings to checking so funds transfer automatically when you overdraw. The transfer fee, if any, is typically lower than what you’d pay on a credit line, and you avoid interest because you’re spending your own money. The limitation is obvious: you need money in savings.2FDIC.gov. Overdraft and Account Fees
- Letting the transaction decline. If you haven’t opted in to standard overdraft coverage, the bank simply declines debit card and ATM transactions that would overdraw the account. Nothing goes through and no fee is charged.1eCFR. 12 CFR 1005.17 – Requirements for Overdraft Services
- Low-balance alerts. Most banks offer text or email alerts when your balance falls below a threshold you set. They don’t prevent an overdraft, but they buy you time to move money before transactions bounce.
- Opting out of standard overdraft. If you previously opted in, you can revoke consent at any time by contacting your bank. This only stops fees on debit card and ATM transactions; checks and recurring payments can still trigger them.3Federal Register. Consumer Financial Protection Circular 2024-05 – Improper Overdraft Opt-In Practices
For people who rarely overdraw, declining transactions or relying on alerts is the cheapest route. For people who overdraw occasionally and have savings behind them, the linked savings account usually makes the most sense. The credit line fits best when you want a safety net without tying up savings and are confident you’ll repay quickly enough to keep interest small.
Is It Still Worth It Given Falling Overdraft Fees?
The overdraft market has shifted since 2020. Several major banks have eliminated overdraft fees, and others have cut them from $35 down to $10 or $15. That narrows the cost advantage a credit line once held. If your bank charges $10 per overdraft, the savings from switching to interest-based coverage are smaller.
Regulatory pressure has added to the shift. In December 2024, the Consumer Financial Protection Bureau finalized a rule that would cap overdraft fees at $5 for the largest banks, with an effective date of October 2025.4Consumer Financial Protection Bureau. Overdraft Lending – Very Large Financial Institutions Final Rule Congress subsequently passed resolutions under the Congressional Review Act to block the rule, and its ultimate fate remains uncertain as of early 2026.
Before applying, check what your bank currently charges for standard overdraft. If the fee is already low and you overdraw once a year, the credit line’s interest and transfer fees might not save you anything. The credit line is the better deal when overdrafts happen more than once or twice a year, when the amounts are large enough for flat fees to stack up, or when your bank still charges in the $25 to $36 range.