Penn State
Agriculture & Extension Education
College of Agricultural Sciences
Family and Consumer Science
Financial and Consumer Literacy


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Cathy Bowen Marilyn Furry

Q.  I'm confused. One source says I should really be concerned about the annual percentage rate for my credit cards and another source recommends paying bills early in the billing cycle to save money. Which source is correct and what should I do?

A.  Unlike "one-size-fits-all" clothing, the best advice about credit cards really depends on many personal factors, including how you use the card and your repayment habits. Both sources have some truth and useful points.

  • If you carry a balance on your credit card, the lower the annual percentage rate (APR) of your card, the less you will pay in interest or finance charges during a given year. In short, if you never pay your bill in full, and other features of several cards are the same, the one with the lowest interest rate will save you the most money over time.
  • If you always carry a balance, making your monthly payment early in the billing cycle (even before the stated due date on the billing statement) will also save you money. Why? Because most credit card issuers use the average daily balance method to figure monthly interest or finance charges. If you make your monthly payment early in the billing cycle, you reduce the daily balance for more days in that cycle. This also reduces the total balance used to figure the average daily balance for that month. See the back page of this sheet for examples of how paying early in the billing cycle reduces the monthly interest charges.
  • If you pay your monthly bills in full each month by the due date, you will avoid all interest charges.

Example 1. Credit Card Charges and Interest When Monthly Payments Are Made Early in the Billing Cycle.

Previous balance (May) = $500, APR = 0.18%, and monthly interest rate = 1.5

June

June

June

June

June

1
2
3
4
5
7
8
9 $400 payment
10
11
12
13
14
15
16
17 $30 prescription
18
19
20
21
22
23
24
25 $300 car payment
26
27
28
29
30

Average daily balance calculations:

Date
(a)

# of Days
(b)

Current Balance
(c)

Total Balance in period
(d) = (b) x (c)

June 1-8
June 9-16
June 17-24
June 25-30

8
8
8
6

500           
500 - 400 = 100
100 + 30 = 130
130 = 300 = 430

8 x 500 = 4,000
8 x 100 =   800
8 x 130 = 1,040
6 x 430 = 2,580


Total Balance = $8,420

Average daily balance = total daily balances/# of days in billing cycle
= $8,420 ÷ 30
= $280.67
Interest charge = $280.67 x .015 = $4.21



Example 2. Credit Card Charges and Interest When Monthly Payments Are Made Late in the Billing Cycle.

Previous balance (May) = $500, APR = 0.18%, and monthly interest rate = 1.5

June June

June

June June
1
2
3
4
5
7
8
9
10
11
12
13
14
15
16
17 $30 prescription
18
19
20
21
22
23
24
25 $300 car payment
26
27
28
29 $400 payment
30


Average daily balance calculations:

Date
(a)

# of Days
(b)

Current Balance
(c)

Total Balance in period
(d) = (b) x (c)

June 1-16
June 17-24
June 25-28
June 29-30

16
8
4
2

$500           
500+ 30 = 530
530 + 300 = 830
830 - 400 = 430
16 x 500 = 8,000
8 x 530 = 4,240
4 x 830 = 3,320
2 x 430 = 860

Total Balance = $16,420
Average daily balance = total daily balances/# of days in billing cycle
= $16,420 ÷ 30
= $547.33
Interest charge = $547.33 x .015 = $8.21



Prepared by Cathy Faulcon Bowen, assistant professor, Department of Agricultural and Extension Education.

 

Please e-mail us with your questions, comments or suggestions at cfb4@psu.edu.
Last Update: April 10, 2008
Financial & Consumer Literacy contact:
Cathy Bowen cbowen@psu.edu or Marilyn Furry mfurry@psu.edu

 

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