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Are variable rate loans ever a good idea?
Fixed  You are confirming the amount you are going t pay over the term of the loan. Variable: 3.79% over 82mo. The total difference over the life of the loan comes to around $1200 That is the wrong way to calculate the variable portion. The variable is primarily set with a margin over a certain benchmark i.e. Fed rate. Assuming the Fed rate doesn't change over or only goes lower the variable rate is the one to go. If it rises then your payment will increase. And the margin they take over the benchmark rate may increase, so the total amount you pay might increase too.  I would assume a read through the T&Cs should clarify that for you. Is it ever a good idea to choose a variable rate loan? Only if you think we are in a low interest rate environment i.e. the economy is in doldrums and the Feds are trying to simulate the economy by decreasing the benchmark rates. And you are sure that the lender isn't going to increase his margins if the rate remains low for quite a substantial amount of time. And I might assume there will be penalties for paying off a loan quicker.