Whether to prepay mortgage or invest in stocks
"I strongly doubt your numbers, but lets switch the question around anyway.   Would you borrow 10k on your house to buy stocks on leverage?  That's putting your house at risk to have the chance of a gain in the stock market (and nothing in the market is sure, especially in the short term), and I would really advise against it.  The decision you're considering making resolves down to this one. Note: It is always better to make any additional checks out as ""for principal only"", unless you will be missing a future payment." what other pieces of info should I consider If you don't have liquid case available for unexpected repairs, then you probably don't want to use this money for either option.  The 7% return on the stocks is absolutely not guaranteed. There is a good amount of risk involved with any stock investment. Paying down the mortgage, by contrast, has a much lower risk. In the case of the mortgage, you know you'll get a 2.1% annual return until it adjusts, and then you can put some constraints on the return you'll get after it adjusts. In the case of stocks, it's reasonable to guess that it will return more than 2.1% annually if you hold it long enough. But there will be huge swings from month to month and from year to year. The sooner you need it, the more guaranteed you will want the return to be. If you have few or no stock (or bond)-like assets, then (nearly) all of your wealth is in your house, and that is independent of the remaining balance on your mortgage. If you are going to sell the house soon, then you will want to diversify your assets to protect you against a drop in home value. If you are going to stay in the house forever, then you will eventually need non-house assets to consume. Ultimately, neither option is inherently better; it really depends on what you need. In all likelihood, the best thing you can do, if these really are your only two options (ie no other debt at all), paying-down your mortgage will shorten the term of the mortgage, and mean you spend less on your house in the long run. Investing is should be a long-term activity - so yes, the likelihood is that, given a modest investment, it will gain at historical averages over the life of the investment vehicle. However, that is not a guarantee, and is an inherent risk. Whereas paying-down a mortgage lowers your financial obligations and risk, investing increases your risk. I want to know how you got a 2.1% interest rate on a mortgage, though - the lowest I've seen anywhere is 3.25%. The short answer is to invest it since the rate of return is higher than your mortgage. (Assuming that you can withstand interest rate hikes, meet short term liquidity needs and don't need your $10K in the short or near term). The long answer is if you're comfortable leveraging your house and can put that $10K away for the long term you can reduce your taxes via the Smith Manoeuvre: Alternatively, if you have kids or grandkids and will help them through school, take the government's money by putting it away in an RESP.
Common investment advice recommends paying off all debt before you invest.  This is certainly not debated when the debt is credit card debt or other high interest debt.  Some would argue this doesn't necessarily apply to school debt or mortgage debt, however its not clear what to suggest.  Since any investment you make is unknown whether you will win or lose money, and every debt you have is guaranteed to be a loss via interest, its almost always a good idea to pay off all of your debt first. "Is the mortgage debt too high? The rental property is in a hot RE market, so could be easily sold with significant equity. However, they would prefer to keep it. Given the current income, there is no stress. However in absence of any other liquid [cash/near cash] assets, having everything locked into Mortgage is quite high. Even if real estate builds assets, these are highly illiquid investments. Have debt on such investments is risky; if there are no other investments. Essentially everything looks fine now, but if there is an crisis, unwinding mortgage debt is time consuming and if it forces distress sale, it would wipe out any gains. Can they afford another mortgage, and in what amount? (e.g. they are considering $50K for a small cabin, which could be rented out). I guess they can. But should they? Or diversify into other assets like stocks etc. Other than setting cash aside, what would be some good uses of funds to make sure the money would appreciate and outpace inflation and add a nice bonus to retirement? Mutual Funds / Stocks / bullions / 401K or other such retirement plans. They are currently in mid-30's. If there is ONE key strategy or decision they could make today that would help them retire ""early"" (say, mid-50's), what should it be? This opinion based ... it depends on ""what their lifestyle is"" and what would they want their ""lifestyle"" to be when they retire. They should look at saving enough corpus that would give an year on year yield equivalent to the retirement expenses." If you wait to pay it off until you are required to in order to avoid interest (the end of the 'grace period'), then you are receiving what's known as a 'float' - basically, you have some money earlier than you would otherwise.  Banks and other companies profit substantially from floats (such as when banks take your deposited check and put a seven day hold on it) by investing that money in money-making activities and not allowing you to use it until later.   As an individual, particularly if you're not a frequent investor, you typically benefit less than a bank would from a float, since you have less options for investing that money with a short turnaround.  Technically speaking it's sort of like you're getting a constant advance on your paycheck 21-40 days; so in that sense, you benefit because you get to have that stuff (television, food, whatever you're buying on credit) a month or so before you have to pay for it, and you get a month or so's benefit from it. So, yes, you get a small benefit from paying your bill when it's due and not prepaying.  Whether that benefit is worth the potential downsides (forgetting to pay and accruing interest) depends on your habits. "If by ""investment"" you mean something that pays you money that you can spend, then no. But if you view ""investment"" as something that improves your balance sheet / net worth by reducing debt and reducing how much money you're throwing away in interest each month, then the answer is definitely yes, paying down debt is a good investment to improve your overall financial condition. However, your home mortgage might not be the first place to start looking for pay-downs to save money.  Credit cards typically have much higher interest rates than mortgages, so you would save more money by working on eliminating your credit card debt first. I believe Suze Orman said something like: If you found an investment that paid you 25% interest, would you take it?  Of course you would!  Paying down high interest debt reduces the amount of interest you have to pay next month.  Your same amount of income will be able to go farther, do more because you'll be paying less in interest. Pay off your credit card debt first (and keep it off), then pay down your mortgage. A few hundred dollars in extra principal paid in the first few years of a 30 year mortgage can remove years of interest payments from the mortgage term. Whether you plan to keep your home for decades or you plan to move in 10 years, having less debt puts you in a stronger financial position." "For some people, it should be a top priority.  For others, there are higher priorities.  What it should be for you depends on a number of things, including your overall financial situation (both your current finances and how stable you expect them to be over time), your level of financial ""education"", the costs of your mortgage, the alternative investments available to you, your investing goals, and your tolerance for risk. Your #1 priority should be to ensure that your basic needs (including making the required monthly payment on your mortgage) are met, both now and in the near future, which includes paying off high-interest (i.e. credit card) debt and building up an emergency fund in a savings or money-market account or some other low-risk and liquid account.  If you haven't done those things, do not pass Go, do not collect $200, and do not consider making advance payments on your mortgage.  Mason Wheeler's statements that the bank can't take your house if you've paid it off are correct, but it's going to be a long time till you get there and they can take it if you're partway to paying it off early and then something bad happens to you and you start missing payments.  (If you're not underwater, you should be able to get some of your money back by selling - possibly at a loss - before it gets to the point of foreclosure, but you'll still have to move, which can be costly and unappealing.)  So make sure you've got what you need to handle your basic needs even if you hit a rough patch, and make sure you're not financing the paying off of your house by taking a loan from Visa at 27% annually. Once you've gotten through all of those more-important things, you finally get to decide what else to invest your extra money in.  Different investments will provide different rewards, both financial and emotional (and Mason Wheeler has clearly demonstrated that he gets a strong emotional payoff from not having a mortgage, which may or may not be how you feel about it).  On the financial side of any potential investment, you'll want to consider things like the expected rate of return, the risk it carries (both on its own and whether it balances out or unbalances the overall risk profile of all your investments in total), its expected costs (including its - and your - tax rate and any preferred tax treatment), and any other potential factors (such as an employer match on 401(k) contributions, which are basically free money to you).  Then you weigh the pros and cons (financial and emotional) of each option against your imperfect forecast of what the future holds, take your best guess, and then keep adjusting as you go through life and things change. But I want to come back to one of the factors I mentioned in the first paragraph.  Which options you should even be considering is in part influenced by the degree to which you understand your finances and the wide variety of options available to you as well as all the subtleties of how different things can make them more or less advantageous than one another.  The fact that you're posting this question here indicates that you're still early in the process of learning those things, and although it's great that you're educating yourself on them (and keep doing it!), it means that you're probably not ready to worry about some of the things other posters have talked about, such as Cost of Capital and ROI.  So keep reading blog posts and articles online (there's no shortage of them), and keep developing your understanding of the options available to you and their pros and cons, and wait to tackle the full suite of investment options till you fully understand them. However, there's still the question of what to do between now and then.  Paying the mortgage down isn't an unreasonable thing for you to do for now, since it's a guaranteed rate of return that also provides some degree of emotional payoff.  But I'd say the higher priority should be getting money into a tax-advantaged retirement account (a 401(k)/403(b)/IRA), because the tax-advantaged growth of those accounts makes their long-term return far greater than whatever you're paying on your mortgage, and they provide more benefit (tax-advantaged growth) the earlier you invest in them, so doing that now instead of paying off the house quicker is probably going to be better for you financially, even if it doesn't provide the emotional payoff.  If your employer will match your contributions into that account, then it's a no-brainer, but it's probably still a better idea than the mortgage unless the emotional payoff is very very important to you or unless you're nearing retirement age (so the tax-free growth period is small).  If you're not sure what to invest in, just choose something that's broad-market and low-cost (total-market index funds are a great choice), and you can diversify into other things as you gain more savvy as an investor; what matters more is that you start investing in something now, not exactly what it is. Disclaimer: I'm not a personal advisor, and this does not constitute investing advice.  Understand your choices and make your own decisions." "Which option will save you the most money in the long run? That is tough. Assuming you stay healthy, don't lose your job, don't experience a pay cut or any major emergency that drains your savings, then applying the $6000 to the higher interest loan will save you more money in the long run. However, the difference in savings is a few hundred dollars. Not much really. So, in this case, I'd put the $6k towards the smaller loan. Why? Because then you'd pay it off faster. Once that's done, you open up your cash flow by the minimum monthly payment you would have had on that loan.  Assuming they both have the same or similar number of months left, by paying the smaller loan off sooner, you'd open up $X month, where $X is your minimum monthly payment. This could be useful to you if you want to take on some other debt (like buying a house) because it lowers your debt to income ratio. If you put that money towards the higher loan, your DTI won't change until the normal time you would have paid off the smaller loan. Even if you are not looking to purchase anything that requires you to have a lower DTI, paying the smaller loan off sooner increases your cash flow sooner (because your monthly payment on the higher loan doesn't change just because you lowered the balance by $6k). So you'd be more robust to emergencies if your current income doesn't allow for much savings. A major emergency could wipe out all savings from paying down the bigger balance. So, I'd suggest: Edit: TripeHound asked a question, pretty much requesting more details for why I was biased towards paying off the smaller loan first. What follows is my response, with a bit of reorganization: Typically, people asking these questions don't have so much wealth that ""which loan to pay first?"" is an academic question. They need to make smart financial decisions. While paying the highest interest loan saves the most money in interest - that only occurs under the assumption that nothing bad will ever happen to you until the loans are paid off. In reality, other things happen. Tires blow out, children get sick, you get laid off and so the ""best"" thing to do is the one that maximizes your long term financial health, even if it comes at the expense of a few $k more interest. Each loan has a minimum monthly payment. Let's assume, barring any windfalls of additional cash, you will just make the minimum payments each month towards a loan. If you pay off the smaller loan first, that increases your available monthly cash flow. At that point, you can put extra towards the other loan. However, if an emergency should come up, or you need to save for a vacation, you can do that, without negatively impacting the second loan, because you'd just drop back to its minimum payment. Putting the money towards the higher balance loan would mean it takes you longer to reach this point as the time to reach payoff on the first loan will not change ($6k only reduces the $25.6k loan to $19.6k) so you never gain the flexibility of additional cash flow until the time you would have paid off the $13.5k originally. I'd rather have a few hundred dollars each month that I can choose to use to make additional loan payments, eat out, pay for car repairs, pay for emergencies than be forced to dip into credit or worse, pay day loans, should an emergency happen." "Paying off your house quickly should be a #2-level priority, behind making sure you have some basic savings but definitely ahead of any investing concerns, because your house is not an investment; it's your home.  (If you're brave/foolish enough to try buying houses-as-investments in the current climate, this obviously doesn't apply to you!) This isn't a financial matter so much as an issue of basic prudence.  If something disastrous happens, (you lose your job, get in a serious car accident, your kid comes down with cancer, etc,) it will put tremendous strain on your financial resources.  If you own your home outright when this happens, it means that no matter what else might go wrong, you can't get foreclosed on and end up out on the streets, and that's worth more than any rate of return you can reasonably expect to find even in the best of times. It's a well-known investing maxim to ""never bet anything that you can't afford to lose.""  In light of that, consider this: if you have a mortgage that is not paid off, that's exactly what you're doing.  You are placing a bet against a bank that you'll remain solvent long enough to pay off the mortgage, and your home is the wager.  Mortgages may be a necessary evil with housing prices being what they are, but make no mistake, they are evil.  Get rid of yours as quickly as you can." "As @AlexKuhl says, ever? yes, but generally? no. If your 401k is invested in stocks and bonds, the long term return is very likely higher than the interest on a mortgage. Long term return on the stock market is around 7%. Mortgage rates these days are around 4%. Add the tax penalty on top of that and you're almost surely better to keep your money in the 401k. There's also the psychological/budgeting factor. People very often say, ""I'll pull money out of my retirement fund for this important purchase and then put it back later."" And then later comes and there are other expenses and things they want to do and they never put the money back."