Teaser Rate vs Go-To Rate on Personal Lines of Credit: What the Real Cost Looks Like After Month Six

Fact-checked by the CapitalLendingNews editorial team

A teaser rate on a personal line of credit looks like cheap money, 4.99% to 8% for six months, while a go‑to rate is the permanent variable price you pay after the introductory window slams shut. The core difference is that a teaser rate personal credit line front‑loads affordability and then resets to a much higher margin tied to the bank prime rate, currently at 6.75% according to Federal Reserve data. The real cost isn’t what you pay in month one; it’s what you owe starting in month seven.

Repayment speed is the single factor that swings the choice most. Pay off every dollar during the teaser period and you borrow nearly free. Let any balance revolve into the go‑to phase and the effective APR jumps, often crossing 14% within the first post‑teaser billing cycle. Your timeline dictates whether the teaser saves you hundreds, or costs you more than a plain‑vanilla fixed‑rate loan ever would.

Attribute	Teaser Rate Personal LOC	Go‑To Rate Personal LOC
Introductory Rate	4.99% – 8% APR	None (standard variable rate applies from day one)
Standard Variable Rate	12% – 17% APR after intro ends (Prime + 5.25% – 10.25% margin)	12% – 17% APR (Prime + margin) continuously
Rate Type	Fixed for 6 – 12 months, then variable	Fully variable, resets with Prime
Duration of Low Rate	Defined: 6 – 12 months, clearly disclosed	No promotional window
Draws During Promotional Period	Every draw gets the teaser rate until end date	All draws carry the go‑to variable rate
Minimum Monthly Payment	Often interest‑only or 1% of balance	1% – 2% of balance or interest + 1% of principal
Annual Fee	$0 – $50 in year one (often waived)	$25 – $100 annually
Deferred Interest	Not typical on LOCs; interest accrues daily on outstanding balance	Same accrual method, no deferred traps
Predictability After 6 Months	Low, rate shock hits at reset	High, rate moves only with Prime, no cliff
Best For	Short‑term bridge, debt consolidation paid off within 6 months	Ongoing liquidity needs, long‑term revolving use

What a Teaser Rate Actually Means on a Personal Line of Credit

An introductory APR on an unsecured personal line of credit is a marketing hook, not a permanent price. Lenders, including large banks like Chase and US Bank as well as online lenders like SoFi, offer rates as low as 4.99% for 6 to 12 months to attract borrowers who need flexible cash, and then the rate automatically resets to the go‑to variable rate, built as the bank prime rate plus a margin that can range from 5.25% to 10.25%. With the prime rate at 6.75%, the go‑to APR often lands between 12% and 17% the moment the teaser expires.

The switch isn’t triggered by anything you do wrong; it’s calendar‑driven. Day 181 after account opening, or the statement period following the end date in your agreement, the interest formula changes. That’s standard across institutions like Wells Fargo, US Bank, and digital lenders such as SoFi. The Regulation Z disclosure you sign will list both the teaser end date and the index‑plus‑margin formula the go‑to rate follows, but many borrowers skim that box and focus only on the shiny intro number.

One real limitation worth naming: borrowers with variable income, such as freelancers or commission‑based earners, face compounding risk here. If income dips right as the go‑to rate kicks in and a balance remains, the higher interest charges arrive at exactly the wrong moment. The CFPB has flagged this pattern repeatedly in its supervisory reports. A personal line of credit with a teaser reset is not the right tool for someone whose cash flow is unpredictable month to month, regardless of how attractive the intro rate looks.

The Real Cost After Month Six: A Breakdown

On a $10,000 balance drawn on day one and carried untouched, a 6% teaser rate costs about $50 in interest per month. When the go‑to rate resets to 13% at month seven, the monthly interest jumps to roughly $108, more than double. Over months 7 through 12, that alone adds an extra $348 in interest, and if you’re still drawing new funds after the reset, every dollar borrowed costs 13% or more right away.

That figure doesn’t account for new draws. Take another $5,000 at month three and don’t repay it by month seven, and the balance hits $15,000 right as the go‑to rate starts, pushing monthly interest to about $162. The interplay between continued draws and the rate reset is precisely where most cost projections break down. Because a personal line of credit stays open and usable, every post‑teaser draw compounds the higher‑rate burden. Experian data on revolving credit utilization shows that borrowers who treat an open line as a recurring cash source consistently carry larger balances than they originally planned.

Pay aggressively during the teaser and the math flips. Paying down to $2,500 by month six means the go‑to rate only applies to that smaller balance, keeping interest manageable. That’s the real fork in the road: you either shrink the balance before the cliff or you pay the higher rate on whatever you haven’t cleared.

Regulatory Safeguards and Required Disclosures

Federal rules under TILA and Regulation Z require lenders to disclose the teaser rate end date, the index used (typically Wall Street Journal Prime), and the margin added post‑promo. You’ll see this in the account‑opening agreement, usually in a format that makes the go‑to APR as prominent as the teaser. Yet the CFPB logged 224 complaints related to debt or credit management in a recent 30‑day window, many pointing to surprise rate resets, a signal that borrower confusion persists even with mandated transparency.

State‑level usury caps sometimes limit how high the go‑to rate can climb, but unsecured lines of credit often fall through exemptions depending on the lender’s charter, particularly for federally chartered banks supervised by the FDIC or the Office of the Comptroller of the Currency. That means a go‑to APR of 17% may be perfectly legal in one state and barred in another. Checking your state’s maximum rate before signing is worth the 10 minutes it takes.

Hidden Costs That Inflate the Real Price

Annual fees that are waived during year one reappear in year two, often at $50 to $100, nibbling away any savings you banked during the teaser. Transaction fees per draw, sometimes 1% to 3% of the amount, don’t pause when the rate resets. Together with a late payment penalty that can push the effective APR into the 20%+ range, these add‑ons turn a “low‑cost” line into an expensive revolving account. Your FICO Score can also take a secondary hit if a late fee triggers a derogatory payment mark, since payment history accounts for 35% of the FICO calculation.

Variable rate resets tied to Federal Reserve rate decisions add another layer. If the Fed raises the federal funds rate, currently 3.63% according to FRED data, the prime rate moves almost in lockstep, and your go‑to APR ticks up within one or two billing cycles. A borrower who locked in a teaser at 6% could face a go‑to rate that climbs from 13% to 14.25% over the following year purely from Fed hikes, even if they never miss a payment.

When a Teaser Rate Personal LOC Delivers Savings vs. When It Backfires

Used as a consolidation tool, a teaser rate personal credit line can produce real savings. Moving a $7,500 balance from a card at 22% to a teaser LOC at 6% and paying $1,250 per month clears the debt in 6 months with about $135 in interest, compared to roughly $495 on the card, a $360 savings. That’s a concrete win, provided you stop drawing new funds and close the line or pay it to zero. Our guide on combining multiple debt payments into one plan shows when that math holds.

Carry even a moderate balance past month six, though, and the savings evaporate. Suppose you only pay down to $3,000 before the reset. At a 13% go‑to rate, you’ll pay roughly $390 more in interest over the next 12 months than a fixed‑rate personal loan at 9% would cost. And if you’ve also opened new draws after the teaser, the total interest tally can easily surpass what a plain fixed‑rate loan from a peer‑to‑peer platform would have run.

Credit score impact follows the same arc. The hard inquiry for a new line temporarily dings scores, but paying off nearly the entire balance during the teaser drops utilization and can lift your FICO Score by 20 to 40 points, as our breakdown of credit score interest‑rate tiers illustrates. Leave a large balance when the go‑to rate starts, though, and high revolving utilization becomes a drag even if payments are on time. Experian and other credit bureaus update utilization monthly, so a persistently high balance will show up in your debt‑to‑income ratio (DTI) whenever you next apply for credit.

When a Teaser Rate Is the Better Choice

An introductory‑rate personal line of credit is the sharper tool when the payoff timeline is short and certain.

• You plan to repay 100% of the balance within 6 months and have a documented payment schedule.
• You are consolidating credit card debt with APRs above 18% and know you can live without new charges during the payoff sprint.
• You need bridge financing for a known expense, like a tax bill or home repair, that you’ll clear with a lump sum within the teaser window.
• You can avoid the year‑two annual fee by closing the line immediately after payoff.
• Your credit profile qualifies for a teaser under 8% APR, making the spread against the go‑to rate wide enough to matter.

When a Go‑To Rate Is the Better Choice

Choosing a standard variable‑rate personal line from the start, or intentionally riding out the go‑to phase, makes sense when stability and long‑term liquidity matter more than a temporary discount.

• You expect to carry a revolving balance beyond 12 months and need predictable, gradual rate movement rather than a one‑time shock.
• You want ongoing access to funds over several years and don’t want to time a payoff cliff.
• You’ve compared the go‑to APR with a fixed‑rate personal loan and find the flexibility worth the variable cost, especially if you can lock a lower margin because of excellent credit.
• You dislike the risk of a teaser reset pushing your monthly obligation suddenly higher, which could strain cash flow during an uneven income month.
• You plan to use the line only occasionally and pay off quickly each time, so the nominal go‑to rate applies only briefly.

Criterion	Teaser Rate Personal LOC	Go‑To Rate Personal LOC
Short‑Term Interest Cost (12 mo, repaid in full by mo 6)	Excellent (5/5)	Good (3/5), higher from day one but no cliff
Long‑Term Interest Cost (24+ mo, ongoing balance)	Poor (2/5), post‑teaser rate erodes savings	Fair (3/5), steady variable rate, avoids reset shock
Flexibility for Unplanned Draws	Good (4/5), low rate on early draws	Good (4/5), always available, predictable cost
Predictability After First 6–12 Months	Low (2/5), cliff event	Moderate (3/5), moves with Prime, no cliff
Risk of Rate Shock	High (2/5)	Low (4/5)
Overall Fit for Most Borrowers	Win: planned short‑term payoff	Win: ongoing liquidity or uncertain timeline

Frequently Asked Questions

What is a teaser rate on a personal line of credit?

A teaser rate is a temporary low introductory APR typically lasting 6 to 12 months on an unsecured personal line of credit. After the promo period, the rate resets to a higher variable rate tied to the prime index plus a lender margin.

How long do teaser rates last on personal credit lines?

Most teaser rates run for 6 months, with a few lenders extending them to 12 months. The exact end date is disclosed in the account agreement under the Truth in Lending Act.

What is the go‑to rate after the teaser ends?

The go‑to rate is a variable APR built from the bank prime rate plus a fixed margin. With the prime rate at 6.75%, typical go‑to rates range from 12% to 17% depending on the lender and your credit profile.

Does a teaser rate personal credit line have deferred interest?

No. Interest accrues daily on the outstanding balance from the day you draw funds, even during the teaser period. There is no retroactive interest if you pay late, but carrying a balance past the teaser simply switches you to a higher accrual rate.

Can I still draw money from my line of credit after the teaser rate expires?

Yes, the line remains open. However, any new draws after the teaser period incur the go‑to variable rate immediately, and any remaining pre‑reset balance also shifts to that rate on the end date.

Will my credit score drop after the teaser rate resets?

Not directly from the reset itself, but if you carry a high balance once the go‑to rate starts, your credit utilization ratio stays elevated, which can depress your FICO Score. Paying down the balance before the reset helps keep utilization low and score intact.

What happens if I make only minimum payments during the teaser period?

Minimum payments, often interest‑only during the teaser, keep the account in good standing but barely reduce principal. The full balance rolls into the go‑to rate phase, maximizing the interest you pay after month six.

Is a teaser rate personal LOC better than a 0% APR credit card?

It depends on how you use it. A 0% APR card often has a similar teaser period but may charge a balance transfer fee; a teaser LOC avoids that fee and lets you draw cash directly, but carries a higher go‑to rate if you don’t repay in full. Run the numbers based on your payoff timeline.

Can I refinance my personal line of credit before the rate resets?

You can apply for a new fixed‑rate personal loan and pay off the LOC before the end date. That strategy locks in a lower, predictable rate and eliminates the reset risk, but closing the line may trigger an annual fee if one was waived initially.

Are there any fees that start after the first year?

Yes. Many personal lines of credit waive the annual fee in the first year but begin charging $25 to $100 annually from year two onward. Late payment fees and transaction fees also continue or may increase after the teaser ends.