Calculating savings from mortgage interest deduction vs. standard deduction?
Those choices aren't mutually exclusive.  Yes, most discussion of the mortgage interest deduction ignores the fact that for a standard itemizer, much, if not all of this deduction can be lost.  For 2011, the std deduction for a single is $5,800. It's not just mortgage interest that's deductible, state income tax, realestate tax, and charitable contributions are among the other deductions. If this house is worth $350K, the property tax is about $5K, and since it's not optional, I'd be inclined to assume that it's the deduction that offsets the std deduction. Most states have an income tax, which tops off the rest. You are welcome to toss this aside as sophistry, but I view it as these other deductions as 'lost' first.  I'm married, and our property tax is more than our standard deduction, so when doing the math, the mortgage is fully deductible, as are our contributions.  In your case, the numbers may play out differently. No state tax? Great, so it's the property tax and deductions you'd add up first and decide on the value the mortgage deduction brings.  Last, I don't have my mortgage for the deduction, I just believe that long term my other investments will exceed, after tax, the cost of that mortgage. It's true that the standard deduction makes the numbers less impressive. I ran your scenario through my favorite, most complete rent vs buy calculator, and your math isn't far off. However, there are a lot of deductions only available if you itemize. Medical expenses, moving expenses, job expenses, charitable contributions, local income/sales taxes, property tax, private mortgage insurance, etc. Property tax on that house alone is going to be nearly equal to the standard deduction, so the point is nearly moot. Anyways, the above linked calculator handles all of those, and more.
"Some pros and cons to renting vs buying: Some advantages of buying: When you rent, the money you pay is gone. When you buy, assuming you don't have the cash to buy outright but get a mortgage, some of the payment goes to interest, but you are building equity. Ultimately you pay off the mortgage and you can then live rent-free. When you buy, you can alter your home to your liking. You can paint in the colors you like, put in the carpet or flooring you like, heck, tear down walls and alter the floor plan (subject to building codes and safety consideration, of course). If you rent, you are usually sharply limited in what alterations you can make. In the U.S., mortgage interest is tax deductible. Rent is not. Property taxes are deductible from your federal income tax. So if you have, say, $1000 mortgage vs $1000 rent, the mortgage is actually cheaper. Advantages of renting: There are a lot of transaction costs involved in buying a house. You have to pay a realtor's commission, various legal fees, usually ""loan origination fees"" to the bank, etc. Plus the way mortgages are designed, your total payment is the same throughout the life of the loan. But for the first payment you owe interest on the total balance of the loan, while the last payment you only owe interest on a small amount. So early payments are mostly interest. This leads to the conventional advice that you should not buy unless you plan to live in the house for some reasonably long period of time, exact amount varying with whose giving the advice, but I think 3 to 5 years is common. One mitigating factor: Bear in mind that if you buy a house, and then after 2 years sell it, and you discover that the sale price minus purchase price minus closing costs ends up a net minus, say, $20,000, it's not entirely fair to say ""zounds! I lost $20,000 by buying"". If you had not bought this house, presumably you would have been renting. So the fair comparison is, mortgage payments plus losses on the resale compared to likely rental payments for the same period." In the US, mortgage payments are not deductible. What is deductible is the mortgage interest (to a limit). That, as well, is not deductible unconditionally, but rather as part of your itemized deductions on Schedule A of your yearly tax return. So if you're married and have a standard deduction of $12600 a year, live in a state with no state income tax, and your property tax and the mortgage interest are less than your standard deduction - you will not be getting any tax benefit whatsoever. That is, in fact, the case for many, if not majority, of the US mortgage payers. So in order to get a proper estimate, you need to take into account all the aspects of your tax calculations, which are by nature quite personal, and simulate the changes with the mortgage interest deduction. Most tax preparation software will allow you creating multiple files, so you can run the numbers for different scenarios. The rental income is indeed taxable income, but you reduce the taxable portion of it by deducting expenses (including mortgage interest, maintenance, insurance, HOA, real estate tax, and of course depreciation). Due to the depreciation, you may end up breaking even, or having very little taxable income. Note that when you sell the property, your basis is reduced by the depreciation you were allowed to deduct (even if you haven't deducted it for whatever reason), and also the personal residence exclusion might no longer be applicable - i.e.: you'll have to pay capital gains tax. You will not be able to deduct a loss though if you sell now, so it may be better to depreciate it as a rental, rather then sell at a loss that won't affect your taxes. Also, consider the fact that the basis for the depreciation is not the basis you currently have in the property (because you're under water). You have to remember that when calculating the taxes. This is not a tax advice, and you should seek a professional help. The $250K and up are not one homogeneous group. The lower end of this group benefits from normal Schedule A itemized deductions, e.g. mortgage interest, property tax, state income tax, and charitable donations. As you mention, 401(k) ($17k employee contribution limit this year), but also things like the dependent care account ($5k limit) and flexible spending account, limited usually up to $2500 in '14. The 529 deposits are limited to the gifting limit, $14K in 2014, but one can gift up to five years' deposits up front. This isn't a tax deduction, but does pull money out of one's estate and lets it grow tax free similar to a Roth IRA. The savings from such accounts is probably in the $15k - $20K range given the 20 or so year lifetime of the account and limited deposits. At the higher end, the folks making the news are those whose income is all considered capital gains. This applies both to hedge fund managers as well as CEOs whose compensation included large blocks of stock. This isn't a tax deduction, but it's how our system works, the taxation of capital gains vs. ordinary income. There is a fundamental flaw in this statement:  For example, a home bought cash $100,000 would have to be sold $242,726.247 30 years later just to make up with inflation, and that would be a 0% return. You forgot to deduct rent from your monthly carrying costs.  That changes the calculations significantly.   Your calculations are valid ONLY if you were to buy a house, and let it sit empty, which is unlikely.  Either you are going to live in it, and save yourself $1000 a month in rent, or, you are going to rent it out to someone, and earn an income of $1000 a month. Either way, you're up $1000 a month and this needs to be included. In the United States taxes on the sale of a principal residence are based on the difference between the sale price and the cost of the home. Assuming you meet the requirements you can shelter 250,000 or 500,000 of gains from the sale of your principal residence.  This calculation is not related to the loan balance. The basic equation is sales price minus purchase price. It get a little more complex because some costs to purchase and sell the home are included in the calculation, or if you made renovations to the house that will increase your costs and decrease your gains. Trying to decrease the loan balance just before selling the house would just be paying yourself that money at the settlement table. It could save you some money on interest between now and settlement but emptying your bank account to save a few bucks doesn't seem worth it. I would also prefer to have the money in the bank to pay for some expenses that will popup getting the house sold, you moving, and the settlement date. You need an accountant and/or a lawyer who is familiar with the US tax code and the rules in South Korea (assuming from your tag). As the interest will be money generated in the US, you could be required to withhold some of the interest and remit it to the IRS (I believe 30% withholding rate). Since South Korea is a treaty country, your friend can complete and sign a form W8-BEN and give it to you, so you may withhold a lower amount. Your friend would need to file a return if too much was withheld. They may also get taxed in South Korea. There are probably rules in South Korea about minimum interest that must be charged, similar to Applicable Federal Rates for the US, so check with your accountant or lawyer for this. If you craft it correctly, you will be able to have a loan as a mortgage (with the house properly secured), which then would allow you to deduct mortgage interest rates from your return. As far as I am aware, there is no maximum amount for loans. Very little, as you expected. The CD locks the rate in, meaning you get the rate for sure. The savings account can change any day, so it could fall below the CD's rate. Chances are small, obviously, but it is theoretically possible. If you pay attention, if this happens, you could simply moving it to a CD then (if it is still offered). People with little understanding that want 'security' might be suckered into buying a CD; or there could be versions offered where all the interest comes on the last day (so you delay taxes).