Calculate investment's interest rate to break-even insurance cost [duplicate]
I believe the following formula provides a reasonable approximation. You need to fill in the following variables: The average annual return you need on investing the 15% =  (((MP5 - MP20) * 12) + (.0326 * .95 * PP / Y)) / (PP *.15) Example assuming an interest rate of 4% on a 100K home: If you invest the $15K you'll break even if you make a 9.86% return per year on average. Here's the breakdown per year using these example numbers: Note this does not consider taxes. You are comparing a risk-free cost with a risky return. If you can tolerate that level of risk (the ups and downs of the investment) for the chance that you'll come out ahead in the long-run, then sure, you could do that.   So the parameters to your equation would be: If you assume that the risky returns are normally distributed, then you can use normal probability tables to determine what risk level you can tolerate. To put some real numbers to it, take the average S&P 500 return of 10% and standard deviation of 18%.  Using standard normal functions, we can calculate the probability that you earn more than various interest rates: so even with a low 3% interest rate, there's roughly a 1 in 3 chance that you'll actually be worse off (the gains on your investments will be less than the interest you pay).  In any case there's a 3 in 10 chance that your investments will lose money. I wouldn't call it apples and oranges.  This is literally an opportunity cost calculation.  You can safely assume S&P500 will perform at least 11% over any 10 year period.  Since failing companies are delisted and replaced with new growing companies, the market should continue to grow.  No, it's not guaranteed.  Lets use an aggressive number for inflation, 4%, leaving a 7% ROR estimate for S&P500.  I assume OP has better credit than me, assume a rate around 3.5%.  So it looks like net 3.5% ROR.  The PMI erases that.  You have to continue paying it until you pay off the loan.   Put 20% down, get a 15 year fixed at lowest rate.  Pay it off quicker.
"What are the options available for safe, short-term parking of funds? Savings accounts are the go-to option for safely depositing funds in a way that they remain accessible in the short-term. There are many options available, and any recommendations on a specific account from a specific institution depend greatly on the current state of banks. As you're in the US, If you choose to save funds in a savings account, it's important that you verify that the account (or accounts) you use are FDIC insured. Also be aware that the insurance limit is $250,000, so for larger volumes of money you may need to either break up your savings into multiple accounts, or consult a Accredited Investment Fiduciary (AIF) rather than random strangers on the internet. I received an inheritance check... Money is a token we exchange for favors from other people. As their last act, someone decided to give you a portion of their unused favors. You should feel honored that they held you in such esteem. I have no debt at all and aside from a few deferred expenses You're wise to bring up debt. As a general answer not geared toward your specific circumstances: Paying down debt is a good choice, if you have any. Investment accounts have an unknown interest rate, whereas reducing debt is guaranteed to earn you the interest rate that you would have otherwise paid. Creating new debt is a bad choice. It's common for people who receive large windfalls to spend so much that they put themselves in financial trouble. Lottery winners tend to go bankrupt. The best way to double your money is to fold it in half and put it back in your pocket. I am not at all savvy about finances... The vast majority of people are not savvy about finances. It's a good sign that you acknowledge your inability and are willing to defer to others. ...and have had a few bad experiences when trying to hire someone to help me Find an AIF, preferably one from a largish investment firm. You don't want to be their most important client. You just want them to treat you with courtesy and give you simple, and sound investment advice. Don't be afraid to shop around a bit. I am interested in options for safe, short ""parking"" of these funds until I figure out what I want to do.  Apart from savings accounts, some money market accounts and mutual funds may be appropriate for parking funds before investing elsewhere. They come with their own tradeoffs and are quite likely higher risk than you're willing to take while you're just deciding what to do with the funds. My personal recommendation* for your specific circumstances at this specific time is to put your money in an Aspiration Summit Account purely because it has 1% APY (which is the highest interest rate I'm currently aware of) and is FDIC insured. I am not affiliated with Aspiration. I would then suggest talking to someone at Vanguard or Fidelity about your investment options. Be clear about your expectations and don't be afraid to simply walk away if you don't like the advice you receive. I am not affiliated with Vanguard or Fidelity. * I am not a lawyer, fiduciary, or even a person with a degree in finances. For all you know I'm a dog on the internet." Whenever you put less than 20% down, you are usually required to pay private mortgage insurance (PMI) to protect the lender in case you default on your loan.  You pay this until you reach 20% equity in your home.  Check out an amortization calculator to see how long that would take you.  Most schedules have you paying more interest at the start of your loan and less principal.  PMI gets you nothing - no interest or principal paid - it's throwing money away in a very real sense (more in this answer).  Still, if you want to do it, make sure to add PMI to the cost per month. It is also possible to get two mortgages, one for your 20% down payment and one for the 80%, and avoid PMI.  Lenders are fairly cautious about doing that right now given the housing crash, but you may be able to find one who will let you do the two mortgages.  This will raise your monthly payment in its own way, of course. Also remember to factor in the costs of home ownership into your calculations.  Check the county or city website to figure out the property tax on that home, divide by twelve, and add that number to your payment.  Estimate your homeowners insurance (of course you get to drop renters insurance, so make sure to calculate that on the renting side of the costs) and divide the yearly cost by 12 and add that in.  Most importantly, add 1-2% of the value of the house yearly for maintenance and repair costs to your budget.  All those costs are going to eat away at your 3-400 a little bit.  So you've got to save about $70 a month towards repairs, etc. for the case of every 10-50 years when you need a new roof and so on. Many experts suggest having the maintenance money in savings on top of your emergency fund from day one of ownership in case your water heater suddenly dies or your roof starts leaking.  Make sure you've also estimated closing costs on this house, or that the seller will pay your costs.  Otherwise you loose part of that from your down payment or other savings. Once you add up all those numbers you can figure out if buying is a good proposition.  With the plan to stay put for five years, it sounds like it truly might be.  I'm not arguing against it, just laying out all the factors for you. The NYT Rent Versus Buy calculator lays out most of these items in terms of renting or buying, and might help you make that decision. EDIT: As Tim noted in the comments below, real monthly cost should take into account deductions from mortgage interest and property tax paid.  This calculator can help you figure that out.  This question will be one to watch for answers on how to calculate cost and return on home buying, with the answer by mbhunter being an important qualification There is no generic formula as such, but you can work it out using all known incomes and expenses and by making some educated assuption. You should generaly know your buying costs, which include the purchase price, legal fees, taxes (in Australia we have Stamp Duty, which is a large state based tax when you purchase a property). Other things to consider include estimates for any repairs and/or renovations. Also, you should look at the long term growth in your area and use this as an estimate of your potential growth over the period you wish to hold the property, and estimate the agent fees if you were to sell, and the depreciation on the building. These things, including the agent fees when selling and building depreciation, will all be added or deducted to your cost base to determine the amount of capital gain when and if you sell the property. You then need to multiply this gain by the capital gains tax rate to determine the capital gains tax you may have to pay. From all the items above you will be able to estimate the net capital gain (after all taxes) you could expect to make on the property over the period you are looking to hold it for. In regards to holding and renting the property, things you will need to consider include the rent, the long term growth of rent in your area, and all the expenses including, loan fees and interest, insurance, rates, land tax, and an estimate of the annual maintenance cost per year. Also, you would need to consider any depreciation deductions you can claim. Other things you will need to consider, is the change in these values as time goes by, and provide an estimate for these in your calculations. Any increase in the value of land will increase the amount of rates and the land tax you pay, and generally your insurance and maintenance costs will increase with time. However, your interest and mortgage repayments will reduce over time. Will your rent increases cover your increases in the expenses. From all the items above you should be able to work out an estimate of your net rental gain or loss for each year. Again do this for the number of years you are looking to hold the property for and then sum up the total to give a net profit or loss. If there is a net loss from the income, then you need to consider if the net capital gain will cover these losses and still give you a reasonable return over the period you will own the property. Below is a sample calculation showing most of the variables I have discussed. How much money do you have in your money market fund and what in your mind is the purpose of this money? If it is your six-months-of-living-expenses emergency fund, then you  might want to consider bank CDs in addition to bond funds as an alternative to  your money-market fund investment. Most (though not necessarily all, so be sure to check) bank CDs can be cashed in at any time with a penalty of three months of interest, and so unless you anticipate being laid off very soon, you might get a slightly better rate of interest, FDIC insurance (which mutual funds do not have), and with any luck you may never have to break a CD and lose the interest. Building a ladder of CDs with one maturing each month might be another way to reduce the risk of loss.  On the other hand, bond mutual funds are a risky bet now because your investment will lose value if interest rate go up, and as JohnFx points out, interest rates have nowhere to go but up.  Finally, the amount of the investment is something that you might want to consider before making changes. If you have $50K put away as your six-month fund, you are talking of $500 versus $350 per annum in changing to a riskier investment with a 1% yield from a safer investment with a 0.7% yield. Whether bragging rights at neighborhood parties are worth the trouble is something for you to decide. Part A solution:  Assume no turnover in A.:      Average Balance * Annual Interest - Average Balance * Annual Cost of funds + Annual Fee = Profit from A        Profit From A = Average Balance * Interest Rate - Cost of Funds * Average Balance + Annual Fee     So for B here is the sneaky thing, the Average Balance is 1/12 of the Volume... That makes it really simple...       Volume * InterChange - Average Balance * Cost of Funds + Annual Fee = Profit From A       Volume = 12 x Average Balance So:       12 x Average Balance * Interchange (0.015) - Average Balance * Cost of Funds (0.04) + Annual Fee (Say 50)= Profit From A (260)       0.18* Average Balance - 0.04 * Average Balance = 210  Average Balance = 210/.14  Annual turnover = 12* Average Balance   Come @ me bro :p Seems like a bad deal to me. But before I get to that, a couple of points on your expenses: Onward. You value a property by calculating its CAP rate. This is what you're calculating, except it does NOT include interest like you did -- that's a loan to you, and has no bearing on whether the unit itself is a good investment. It also includes estimations of variable expenses like maintenance and lack of income from vacancies. People argue vociferously on exactly how much to calculate for those. Maintenance will vary by age of the building and how damaging your tenets are. Vacancies vary based on how desirable the location is, how well you've done the maintenance, and how low the rent is. Doing the math based on your numbers, with just the fixed expenses: 8400 rent - 2400 management fee - 100 insurance = 5900/year income. 5900/150000 = 0.0393 = 3.9% CAP rate. And that's not even counting the variable expenses yet! So, what's a good CAP rate? Generally, 10% CAP rate is a good deal, and higher is a great deal. Below that you have to start to get cautious. Some places are worth a lower rate, for instance when the property is new and in a good location. You can do 8% on these. Below 6% CAP rate is usually a really bad investment.  So, unless you're confident you can at least double the rent right off the bat, this is a terrible deal. Another way to think about it You're looking to buy with your finances in just about the best position possible -- a huge down payment and really low interest. Plus you haven't accounted for maintenance, taxes (if any), and vacancies. And still you'd make only a measly 1.2% profit? Would you buy a bond that only pays out 1.2%? No? What about a bond that only pays 1.2%, but also from time to time can force YOU to pay into IT a much larger amount every month? "I think the real answer to your question here is diversification.  You have some fear of having your money in the market, and rightfully so, having all your money in one stock, or even one type of mutual fund is risky as all get out, and you could lose a lot of your money in such a stock-market based undiversified investment.  However, the same logic works in your rental property.  If you lose your tennant, and are unable to find a new one right away, or if you have some very rare problem that insurance doesn't cover, your property could become very much not a ""break even"" investment very quickly.  In reality, there isn't any single investment you can make that has no risk.  Your assets need to be balanced between many different market-investments, that includes bonds, US stocks, European stocks, cash, etc.  Also investing in mutual funds instead of individual stocks greatly reduces your risk. Another thing to consider is the benefits of paying down debt.  While investments have a risk of not performing, if you pay off a loan with interest payments, you definitely will save the money you would have paid in interest.   To be specific, I'd recommend the following plan -" The article is talking about relative cost. You could use the cash Schiller P/E ratio as a proxy. That's unit of price per unit of earning. The answer to your question is one time in history, during the 2000 dot com bubble. It's higher than 2008 before the downturn. You are paying more for the same earnings. That has nothing to do with the size of the economy and everything to do with interest rates being too low for too long