What is on the page
- Balance and APR
- From the statement. Use the purchase APR; if part of the balance is a promotional or cash-advance balance at a different rate, run that part separately.
- Fixed monthly payment
- The amount you will pay every month regardless of what the statement says the minimum is. The entire effect of the planner comes from this number not shrinking as the balance falls.
- Months to pay off
- Excel's NPER: how many months a fixed payment takes to clear a balance at a given rate. If the payment is less than one month's interest, the balance never falls and the cell errors.
- Minimum payment
- Most issuers charge the greater of about $25 and 1% of the balance plus that month's interest (some use 2 to 3% of the balance). Because it shrinks with the balance, paying only the minimum on a $4,000 balance at 25% can take well over a decade.
- Daily interest cost
- Balance × APR ÷ 365: what the balance costs you every day you carry it. On the sample card it is about $2.93 a day, which is the number to remember when a purchase is tempting.
- Lump sum
- A one-off payment (bonus, refund, gift) in a particular month. It goes entirely to principal and shortens the schedule more than the same amount spread over months.
- Transfer fee and promo months
- Balance transfer cards charge 3 to 5% of the amount moved up front and give 0% (or a low rate) for 12 to 21 months. The worksheet shows what you would need to pay monthly to clear the balance before the promo ends, and the net saving after the fee.
- Balance left at promo end
- If you pay your planned amount every month, what remains when the 0% period expires and the standard rate kicks in. Ideally zero.
Why minimum payments are designed to last
A minimum of 1% of the balance plus interest means that on a 25% APR card you pay roughly 3% of the balance a month, of which two thirds is interest. The balance falls by about 1% a month, then the minimum falls with it, so the payoff stretches for years while the total interest exceeds the original balance. US issuers have had to print a "minimum payment warning" on every statement since 2010 showing how long payoff takes at the minimum and what a three-year payoff would cost; the calculator sheet reproduces that comparison for any payment you choose. A fixed payment, by contrast, has a compounding effect in your favor: every month, more of the same payment goes to principal.
How to use the planner
- Stop adding to the balance. Move everyday spending to debit or a card you pay in full. Nothing else works if the balance keeps growing.
- Calculator: enter balance and APR, then two or three payment amounts you could manage. Read months and interest for each and compare with the minimum-payment line. Pick a payment.
- Schedule: enter the fixed payment and any lump sums; Excel shows month by month when you reach zero. Tick each month as you pay.
- Balance transfer sheet: if your rate is high and your credit is good, test whether a transfer beats staying put. Only transfer if the checklist is all ticked.
- If you've several cards, use the debt payoff tracker to order them; this planner handles one card at a time.
Balance transfers: when they help and when they hurt
A 0% transfer saves real money when the fee is lower than the interest you would otherwise pay, when you can clear the balance within the promotional period, and when you won't run the old card back up. In the sample, moving $1,860 at 22.49% to a 3%-fee card saves about $147 against paying it down over ten months; a 5% fee saves less, and a 12-month promo at 3.99% with no fee is also worth a look for a smaller balance. Transfers hurt when the balance outlives the promo (standard rates on transfer cards are often higher than average), when the fee eats the saving on a balance you could have cleared in six months anyway, or when the freed-up card becomes new spending. Applying also costs a hard inquiry and lowers your average account age which matters if a mortgage application is coming.
Other ways to lower the cost
- Ask the issuer for a lower APR, especially if you've been a customer for years and pay on time. A hardship program can cut the rate sharply for a fixed period.
- Pay twice a month. Interest is calculated on daily balances, so a mid-cycle payment reduces the average daily balance and the finance charge.
- A personal loan at a fixed rate (often 8 to 15% for good credit) converts a revolving balance into an installment with an end date; use the amortization schedule to compare total cost.
- Pay the statement in full from now on to stop new interest; the grace period on purchases only applies when the previous statement was paid in full.
Editing the Excel versions
The calculator uses NPER for months to pay off and multiplies out total paid and interest; the schedule carries the balance forward with interest and lump sums; the transfer sheet computes fees, the payment needed within the promo and the net saving. Change the minimum-payment assumptions (1%, $25 floor) in the formulas if your card's terms differ. Pair with the budget planner to find the fixed payment, and the expense tracker to stop the balance growing.
Questions
How long will it take to pay off my credit card?
At a fixed payment: the number of months Excel's NPER returns for your balance, APR and payment, which the calculator shows. At the minimum only: usually many years, because the minimum shrinks as the balance falls. Your statement's minimum payment warning box gives the exact figure for your card.
Is a balance transfer a good idea?
If the fee is lower than the interest you would pay, you can clear the balance before the promo ends, and you will not add new charges to either card. The worksheet calculates the first two; only you can promise the third.
Should I pay off the card or save first?
With a card at 20% or more, every dollar paid off earns a guaranteed 20%, which no savings account matches. Keep a small emergency cushion so a surprise doesn't go back on the card, then put everything spare on the balance.
Does paying off a credit card hurt my credit score?
No; paying it down lowers your utilization and helps. Closing the account afterwards can hurt slightly by reducing available credit and average account age. Keep it open with no balance if there is no annual fee.
Why does my interest differ from the schedule?
Issuers calculate interest on the average daily balance at a daily rate, and the timing of your payment within the cycle changes the result. The schedule uses balance × APR ÷ 12, which is close but not exact. New purchases and fees also change the balance.
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