Ignoring what it may or may not do to your credit score:
Since the interest you pay on those debts is tax-deductible, you need to need to know your marginal tax rate to get the full idea of what that interest is costing you. See this IRS link for the rates for 2006. Choose the % amount next to your total taxable income. I’m going to use 25% for an example.
I’m going to make a couple of assumptions:
- You will pay the same amount of principal each year with either loan
- You will pay off the loan in 1 year
These assumptions will make the calculations easier. The amount of time it takes you to pay off the loan will change the numbers, but not the concept. If you pay a different amount to principal with the credit card than with the HELOC/Stu Loan, this will change things considerably.
For the Heloc/Stu Loan, if you paid off the 10,000 loan in 1 year, you would have paid about $400 in interest (10K*.08 / 2 and i’m probably fudging the numbers a bit … this is just for illustration, I’m not worrying about capitalization of interest, etc.) Since that $400 is tax deductible, you’ll pay $100 less in tax this year (400*.25) than you would normally. So, all told, this loan is costing you $300 for the year.
With the credit card, if you paid off the 10,000 balance in 1 year, you would have paid about $200 in interest. (10K*.04 /2)
$200 < $300, so the credit card works out better for you.
Using this concept, I would look up financial calculators on the web that will tell you exactly how much interest you will pay for each loan, based on the interest rate, the payments you will make, and how long it will take you to pay the loan off (these are not easy pen-and-paper calculations, so use something like this). After you have an idea of the total interest you will pay on the HELOC/Stu Loans, subtract the amount of your estimated tax savings (interest*tax rate) from the total interest for those loans. If that adjusted amount is more than the amount of interest you would pay on the credit card, then the credit card is the better choice, if the adjusted amount is less than the total interest you’d pay on a credit card, then sticking with the loans you have is the better choice.
YMMV, I am not a tax professional nor a financial advisor.