Why does my car loan interest go up despite making payments on-time?
Interest is calculated daily. Doing the math: Between 6-17 and 7-25 are 38 days, 200.29 / 38 = 5.27 interest per day. Between 7-25 and 8-17 are 23 days. 120.02 / 23 = 5.22 interest per day. The minimal difference is because the principal has already gone down a little bit. So you should expect ~5.20 x number of days for the next interest number coming up; slowly decreasing as the remaining principal debt decreases. Note that this is equivalent of an annual interest rate of over 20 %, which is beyond acceptable. In the current economy, this is ridiculously high. I recommend trying to get a refinancing with another provider; you should be able to get it for a third of that. The interest probably accrues daily, regardless of whether your payments are on time.
A tip I tend to put in here that doesn't directly relate to student loan payments, but does matter: Don't focus so much on student loan payments that you find yourself needing to tap short-term credit sources to make ends meet. Making a $100 payment on a 6% interest student loan and then needing to charge a $100 car repair on your 19% interest credit card is not a sound financial move. "I am not sure how anyone is answering this unless they know what the loan was for.  For instance if it is for a house you can put a lien on the house.  If it is for the car in most states you can take over ownership of it.   Point being is that you need to go after the asset.   If there is no asset you need to go after you ""friend"".  Again we need more specifics to determine the best course of action which could range from you suing and garnishing wages from your friend to going to small claims court.  Part of this process is also getting a hold of the lending institution.  By letting them know what is going on they may be able to help you - they are good at tracking people down for free. Also the lender may be able to give you options.  For example if it is for a car a bank may help you clear this out if you get the car back plus penalty.  If a car is not in the red on the loan and it is in good condition the bank turns a profit on the default.  If they can recover it for free they will be willing to work with you.  I worked in repo when younger and on more than a few occasions we had the cosigner helping.  It went down like this... Co-signer gets pissed like you and calls bank, bank works out a plan and tells cosigner to default, cosigner defaults, banks gives cosigner rights to repo vehicle, cosigner helps or actually repos vehicle, bank gets car back, bank inspects car, bank asks cosigner for X amount (sometimes nothing but not usually), cosigner pays X, bank does not hit cosigners credit, bank releases loan and sells car.  I am writing this like it is easy but it really requires that asset is still in good condition, that cosigner can get to the asset, and that the ""friend"" still is around and trusts cosigner.  I have seen more than a few cosigners promise to deliver and come up short and couple conspiring with the ""friend"".   I basically think most of the advice you have gotten so far is crap and you haven't provided enough info to give perfect advice.  Seeking a lawyer is a joke.  Going after a fleeing party could eat up 40-50 billable hours.  It isn't like you are suing a business or something.  The lawyer could cost as much as repaying the loan - and most lawyers will act like it is a snap of their fingers until they have bled you dry - just really unsound advice. For the most part I would suggest talking to the bank and defaulting but again need 100% of the details.   The other part is cosigning the loan.  Why the hell would you cosign a loan for a friend?  Most parents won't cosign a loan for their own kids.  And if you are cosigning a loan, you write up a simple contract and make the non-payment penalties extremely costly for your friend.  I have seen simple contracts that include 30% interests rates that were upheld by courts." I would say generally, the answer is No.   There might be some short term relief to people in certain situations, but generally speaking you sign a contract to borrow money and you are responsible to pay.  This is why home loans offer better terms then auto loans, and auto loans better than credit cards or things like furniture.  The better terms offer less risk to the lender because there are assets that can be repossessed.  Homes retain values better than autos, autos better than furniture, and credit cards are not secured at all. People are not as helpless as your question suggests.  Sure a person might lose their high paying job, but could they still make a mortgage payment if they worked really hard at it?  This might mean taking several part time jobs.  Now if a person buys a home that has a very large mortgage payment this might not be possible.  However, wise people don't buy every bit of house they can afford.   People should also be wise about the kinds of mortgages they use to buy a home.  Many people lost their homes due to missing a payment on their interest only loan.  Penalty rates and fees jacked up their payment, that was way beyond their means.  If they had a fixed rate loan the chance to catch up would have not been impossible. Perhaps an injury might prevent a person from working.  This is why long term disability insurance is a must for most people.  You can buy quite a bit of coverage for not very much money. Typical US households have quite a bit of debt.  Car payments, phone payments, and either a mortgage or rent, and of course credit cards.  If income is drastically reduced making all of those payments becomes next to impossible.  Which one gets paid first.  Just this last week, I attempted to help a client in just this situation.  They foolishly chose to pay the credit card first, and were going to pay the house payment last (if there was anything left over).  There wasn't, and they are risking eviction (renters).     People finding themselves in crisis, generally do a poor job of paying the most important things first.  Basic food first, housing and utilities second, etc...  Let the credit card slip if need be no matter how often one is threatened by creditors.  They do this to maintain their credit score, how foolish. I feel like you have a sense of bondage associated with debt.  It is there and real despite many people noticing it.  There is also the fact that compounding interest is working against you and with your labor you are enriching the bank.  This is a great reason to have the goal of living a debt free life.  I can tell you it is quite liberating. First of all, I am sorry for your loss. At this time, worrying about money is probably the least of your concerns. It might be tempting to try to pay off all your debts at once, and while that would be satisfying, it would be a poor investment of your inheritance. When you have debt, you have to think about how much that debt is costing you to keep open. Since you have 0%APR on your student loan, it does not make sense to pay any more than the minimum payments. You may want to look into getting a personal loan to pay off your other personal debts. The interest rates for a loan will probably be much less than what you are paying currently. This will allow you to put a payment plan together that is affordable. You can also use your inheritance as collateral for the loan. Getting a loan will most likely give you a better credit rating as well. You may also be tempted to get a brand new sports car, but that would also not be a good idea at all. You should shop for a vehicle based on your current income, and not your savings. I believe you can get the same rates for an auto loan for a car up to 3 years old as a brand new car. It would be worth your while to shop for a quality used car from a reputable dealer. If it is a certified used car, you can usually carry the rest of the new car warranty. The biggest return on investment you have now is your employer sponsored 401(k) account. Find out how long it takes for you to become fully vested. Being vested means that you can leave your job and keep all of your employer contributions. If possible, max out, or at least contribute as much as you can afford to that fund to get employee matching. You should also stick with your job until you become fully vested. The money you have in retirement accounts does you no good when you are young. There is a significant penalty for early withdrawal, and that age is currently 59 1/2. Doing the math, it would be around 2052 when you would be able to have access to that money. You should hold onto a certain amount of your money and keep it in a higher interest rate savings account, or a money market account. You say that your living situation will change in the next year as well. Take full advantage of living as cheaply as you can. Don't make any unnecessary purchases, try to brown bag it to lunch instead of eating out, etc. Save as much as you can and put it into a savings account. You can use that money to put a down payment on a house, or for the security and first month's rent. Try not to spend any money from your savings, and try to support yourself as best as you can from your income. Make a budget for yourself and figure out how much you can spend every month. Don't factor in your savings into it. Your savings should be treated as an emergency fund. Since you have just completed school, and this is your first big job out of college, your income will most likely improve with time. It might make sense to job hop a few times to find the right position. You are much more likely to get a higher salary by changing jobs and employers than you are staying in the same one for your entire career. This generally is true, even if you are promoted at the by the same employer. If you do leave your current job, you would lose what your employer contributed if you are not vested. Even if that happened, you would still keep the portion that you contributed. Generally speaking personal loans have higher rates than car loans.  During fairly recent times, the market for car loans has become very competitive.  A local credit union offers loans as low as 1.99% which is about half the prevailing mortgage rate.  In comparison personal loans are typically in the 10-14% range.   Even if it made mathematical sense to do so, I doubt any bank would give you a personal loan secured by a car rather than car loan.  Either the brain would not work that way; or, it would simply be against company policy. These questions always interest me, why the desire to maximize credit score?  There is no correlation between credit score and wealth.  There is no reward for anything beyond a sufficiently high score to obtain the lowest rates which is attained by simply paying one's bills on time.  One will always be limited by income when the amount able to borrow is calculated regardless of score.   I can understand wanting to maximize different aspects of personal finance such as income or investment return percentage, etc..  By why credit score?  This is further complicated by a evolving algorithm.  Attempts to game the score today, may not work in the future. "Here's a number-crunching example of how the ""Zero interest rate"" offer is misleading. Suppose the offer is that a car ""costs $24,000.00 with zero percent financing over 24 months""  or as an alternative, ""$3,000.00 off for cash"". Ignore the hype:  the quoted prices and the quoted interest rates.  Look at what really happens to two people who take advantage of the two offers, One person hands over $21,000.00 cash, and leaves with the new car. The second promises to make 24 payments of $1000.00, one a month, starting in one month's time, and also leaves with the same make and model new car. The two people have received exactly the same benefit, so the two payment schemes must have the same value. A mortgage program will tell you that paying off a $21,000.00 loan by making 24 monthly payments of $1000.00 requires an interest rate of 1.10% a month, or an effective annual rate of 14.03%." The only way this suggestion works is if you can realize a higher rate of return on the investment than the payoff of the loan.  There's no guarantee of that, so it can be a risky strategy from the standpoint that you'll end up paying more for the car when all is said and done. Unless you are getting the loan from a loan shark, it is the most common case that each payment is applied to the interest accrued to date and the rest is applied towards reducing the principal.  So, assuming that fortnightly means 26 equally-spaced payments during the year, the interest accrued at the end of the first fortnight is $660,000 x (0.0575/26) = $1459.62 and so the principal is reduced by $2299.61 - $1459.62 = $839.99 For the next payment, the principal still owing at the beginning of that fortnight will be $660,000-$839.99 = $659,160.01 and the interest accrued will be $659,160.01 x (0.0575/26) = $1457.76 and so slightly more of the principal will be reduced than the $839.99 of the previous payment.  Lather, rinse, repeat until the loan is paid off which should occur at the end of 17.5 years (or after 455 biweekly payments). If the loan rate changes during this time (since you say that this is a variable-rate loan), the numbers quoted above will change too. And no, it is not the case that just %5.75 of the $2300 is interest, and the rest comes off the principle (sic)? Interest is computed on the principal amount still owed ($660,000 for starters and then decreasing fortnightly). not the loan payment amount. Edit  After playing around with a spreadsheet a bit, I found that if  payments are made every two weeks (14 days apart) rather than 26 equally spaced payments in one year as I used above, interest accrues at the rate of 5.75 x (14/365)% for the 14 days rather than at the rate of (5.75/26)% for the time between payments as I used above each 14 days, $2299.56 is paid as the biweekly mortgage payment instead of the $2299.61 stated by the OP, then 455 payments (slightly less than 17.5 calendar years when leap years are taken into account) will pay off the loan.  In fact, that 455-th payment should be reduced by 65 cents.  In view of rounding of fractional cents and the like, I doubt that it would be possible to have the last equal payment reduce the balance to exactly 0.