How do amortization schedules work and when are they used?
An amortization schedule is often used to produce identical payments for the term (repayment period) of a loan, resulting in the principal being paid off and the debt retired at the end of the loan. This is in contrast to an interest only, or balloon loan. These loans require little or no payment against the balance of the loan, requiring the loan to be paid indefinitely if there is no term, or requiring the loan to be entirely paid off from cash or a new loan at the end of the term. A basic amortization formula can be derived from the compound interest formula:   This formula comes from the Wikipedia article on amortization. The basics of the formula are the periodic payment amount, A (your monthly payment), can be determined by the principal loan, P, the rate, r, and the number of payments, n.  Lenders lend money to make a profit on the interest. They'd like to get back all the money they lent out. Amortization schedules are popular because the fixed low payments make it easier for borrowers to pay the loan off eventually. They also tend to be very profitable for lenders, especially at the start of the term, because they make a lot of profit on interest, just like the start of your mortgage. The principal of a mortgage has more meaning than the principal of a revolving debt credit card. The mortgage principal is fixed at the start, and represents the value of the collateral property that is your home. You could consider the amount of principal paid to be the percentage of your home that you actually own (as part of your net worth calculation).  A credit card has a new balance each month depending on how much you charge and how much you pay off. Principal has less meaning in this case, because there is no collateral to compare against, and the balance will change monthly. In this case, the meaning of the amortization schedule on your credit card is how long it will take you to pay off the balance if you stop charging and pay at the proscribed payment level over the term described. Given the high interest rate on credit cards, you may end up paying twice as much for goods in the long run if you follow your lenders schedule. Amortizing loans are common for consumer loans, unless a borrower is seeking out the lowest possible monthly payment. Lenders recognize that people will eventually die, and want to be paid off before that happens. Balloon and interest only bonds and loans are more commonly issued by businesses and governments who are (hopefully) investing in capital improvements that will pay off in the long run. Thousands of people and businesses have gone bankrupt in this financial crisis because their interest only loans reached term, and no one was willing to lend them money anymore to replace their existing loan. Amortization is the process by which your loan balance decreases over time. For both mortgages and credit card balances, your interest charges are based on what you owe.  The calculation of the balance is a little different, but it still is based on what you owe. You're observing correctly that most of the first payments on a mortgage are interest.  This stands to reason since an amortization schedule (for a fixed-rate mortgage) is constructed on the assumption that you're making your payments equally over the course of the mortgage.  Since you owe more at the beginning, you accrue more interest, and a larger fraction of your payment is interest.  Near the end, you owe little, and most of your payment, therefore, is principal. Both Credit Card and Mortgage work on same principle. The interest is calculated on the remaining balance.  As the balance reduces the interest reduces. The Mortgage schedule is calculated with the assumption that you would be paying a certain amount over a period of years. However if you pay more, then the balance becomes less, and hence the subsequent interest also reduces. This means you would pay the loan faster and also pay less then originaly forecasted. The other type of loan, typically personal loans / auto loans in older days worked on fixed schedule. This means that you need to pay principal + Pre Determined interest. This is then broken into equal monthly installment. However in such a schedule, even if you pay a lumpsum amount in between, the total amount you need to pay remains same. Only the tenor reduces. Simply put, for a mortgage, interest is charged only on the balance as well. Think of it this way - on a $100K 6% loan, on day one, 1/2% is $500, and the payment is just under $600, so barely $100 goes to principal. But the last payment of $600 is nearly all principal.  By the way, you are welcome to make extra principal payments along with the payment due each month. An extra $244 in this example, paid each and every month, will drop the term to just 15 years. Think about that, 40% higher payment, all attacking the principal, and you cut the term by 1/2 the time.
Others have suggested paying off the student loan, mostly for the satisfaction of one less payment, but I suggest you do the math on how much interest you would save by paying early on each of the loans: When you do the calculations I think you'll see why paying toward the debt with the highest interest rate is almost always the best advice. Whether you can refinance the mortgage to a lower rate is a separate question, but the above calculation would still apply, just with different amortization schedules. Interns are not hired to do work, they are hired so that people at the company can get a look at their abilities in a real situation (not an interview) before hiring them for real. This way instead of 30% of your new hires being a dud, it's more like 5%, because the bad ones were filtered out in the intern process. If you are self-motivated and good enough, then it's quite possible that you will start getting real work while you're at the company, as opposed to throwaway assignments that nobody cares about. Once you're in that position, it means they trust you to actually accomplish something, and you will be viewed as a hopeful hire. Assuming you like the company, getting into that position is half the value of the internship. So I'd take it as-is with one caveat - ask them about schedule flexibility ahead of time, explicitly for the purpose of making sure your class schedule works. If they're a decent place to work for they will probably grant you that point outright. EDIT: One more note. If you've got a favor to burn, save it. Use it if you like the place and need to ask them for an H1B sponsorship, or any other kind of immigration assistance. I am wondering weather it is worth it (how taxation works in this   scenario ect.) or not and legally possible to do so ? Whether it is worth it or not is up to you. There's nothing illegal in this, unless of course there's a legal issue in the foreign country. The US doesn't care. Re taxes - it is a bit trickier. If your lender does not provide you with form 1098, you'll have to report the lender's name, address and SSN/ITIN on your tax return in order to claim a deduction. The IRS will then expect the lender to report that interest as income. This is US-sourced income and is taxed in the US despite the fact that the lender is non-resident. See here for more info. If the lender doesn't report the income and doesn't pay the taxes - your deduction may be denied as well for double-dipping. It is easier if this is an investment. Then the deduction is not going to Schedule A, but rather as an expense to Schedule E. The IRS may still require matching, but you won't need to report the SSN/ITIN - just have the expense properly documented. Obviously, the best when it comes to legal issues, is to talk to an attorney licensed in the State in question. Similarly with tax questions - you should talk to a EA/CPA licensed in that State. I'm neither. "Why?  I did comp sci and have an MBA. I also do EMT work as a volunteer in a rural community.  Do my toes are in both pools.  I would really question deeply the motives from moving to business from medicine.  Despite the articles you see, an MBA is hardly the road to riches. Most do okay. Top tier grads are making very good money. These are also a small % of people out there working.  Even those making good money sacrifice that for really shitty hours and shit work for a while until they break into the higher earning spots.  The ""models and bottles"" is exaggerated to beg in with, and less and less common every year.  When someone asks me about getting an MBA or finance I ask why. What us their real reason. If its money, don't do it. Do it because you actual ly love the business of business. I have traded stocks since I was 12. Its always been interesting. If I forced myself to do it for the money, I'd be poor and miserable.  I am not rich. But I am comfortable and I live the life and schedule I want. None of that is from that slip of paper. The knowledge I could have (and did) get on my own.   I trade the markets, do real estate, and have 1-3 entrepreneural projects at any given time. Its the life I created for myself. I found it was really the only  way for me to get what I wanted. My goals never fit we all with institution goals.  TL;DR-  what's your motivation? Its probably a shitty move." Do you realise that the examples you have given are for stock splits not for dividends, that is why the date payable is before the ex-date for the split. The payments for the split occur on 30th June and the first day the stock trades with the new split is on the next trading day, being the ex-date, 1st July. I use GNUCash. It's a bit more like Quickbooks than plain Quicken, but it's not all that complicated. Probably the most difficult part is understanding the idea of income accounts.  Benefits: For short term planning, I use scheduled transactions. If I'm spending more than I have, it'll show up here. Every paycheck and dollar spent or invested is recorded with the exact date I anticipate it will happen, 30 days in advance. If that would overdraw my checking account, the Future Minimum Balance field will go negative and red. This lets me move float to higher interest savings and retirement funds, and avoids overdraft fees or other mishaps. By looking 30 days ahead in detail, I have enough time to transfer from illiquid assets. For longer term planning, I keep a spreadsheet around that plans out annual expenses. If I'm spending more than I earn, it shows up here. I estimate everything: expenses, savings, taxes, and income. I need this because I have a lot of expenses that are far less frequent than monthly or paycheck-ly. The beauty of it is that once I've got it in place, I can duplicate the sheet and consider tweaks for say taking a new job or moving, or even just changing an insurance plan (probably less relevant for those with access to NHS). Especially when moving to take a new job, it's not as straightforward as comparing salaries, and thus having a document for the status quo to start from lets you focus on the parts that changed. You set it based on liquidity management. Cash drag is one of the reasons actively managed funds underperform. The longer your settlement date, the less cash you have to hold because you can take three days to liquidate positions to redeem. So it's a convenience vs performance question. "So, let's take a mortgage loan that allows prepayment without penalty. Say I have a 30 year mortgage and I have paid it for 15 years. By the 16th year almost all the interest on the 30 year loan has been paid to the bank This is incorrect thinking.  On a 30 year loan, at year 15 about 2/3's of the total interest to be paid has been paid, and the principal is about 1/3 lower than the original loan amount.  You may want to play with some amortization calculators that are freely available to see this in action.   If you were to pay off the balance, at that point, you would avoid paying the remaining 1/3 of interest.   Consider a 100K 30 year mortgage at 4.5% In month two the payment breaks down with $132 going to principal, and $374 going to interest.  If, in month one, you had an extra $132 and directed it to principal, you would save $374 in interest.  That is a great ROI and why it is wonderful to get out of debt as soon as possible.   The trouble with this is of course, is that most people can barely afford the mortgage payment when it is new so lets look at the same situation in year 15. Here, $271 would go to principal, and $235 to interest.  So you would have to come up with more money to save less interest.  It is still a great ROI, but less dramatic.   If you understand the ""magic"" of compounding interest, then you can understand loans.  It is just compounding interest in reverse.  It works against you."