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Should I get cash from credit card at 0% for 8 months and put it on loans?
On the face, this appears a sound method to manage long run cumulative interest, but there are some caveats. Maxing out credit cards will destroy your credit rating.  You will receive no more reasonable offers for credit, only shady ones.  Though your credit rating will rise the moment you bring the balance back down to 10%, even with high income, it's easy to overshoot the 8 months, and then a high interest rate kicks in because of the low credit rating. Further, maxing out credit cards will encourage credit card lenders to begin cutting limits and at worse demand early payment. Now, after month 6 hits, your financial payment obligations skyrocket.  A sudden jolt is never easy to manage.  This will increase risk of missing a payment, a disaster for such hair line financing. In short, the probability of decimating your financial structure is high for very little benefit. If you are confident that you can pay off $4,000 in 8 months then simply apply those payments to the student loan directly, cutting out the middle man.  Your creditors will be pleased to see your total liabilities fall at a high rate while your utilization remains small, encouraging them to offer you more credit and lower rates. The ideal credit card utilization rate is 10%, so it would be wise to use that portion to repay the student loans. Building up credit will allow you to use the credit as an auxiliary cushion when financial disaster strikes.  Keeping an excellent credit rating will allow you to finance the largest home possible for your money.  Every percentage point of mortgage interest can mean the difference between a million USD home and a $750,000 one.