# Is there an easy way to figure out how much I can spend on a house? **URL:** \ **Category:** Factual Questions\ **Created:** [July 19, 2006, 9:49pm UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245 "2006-07-19T21:49:12Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![John\_Corrado](https://avatars.discourse-cdn.com/v4/letter/j/a88e4f/32.png) [@John\_Corrado](https://boards.straightdope.com/u/John_Corrado)\ **Post date:** [July 19, 2006, 9:49pm UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/1 "2006-07-19T21:49:12Z")
Is there any easy and quick way to figure out how much of a total mortgage one can generally afford based on how much one can afford to pay as a monthly payment? That is, if I pay X amount each month in rent, I can afford a house of Y\*X value without increasing my monthly payment. I’ve searched the web for Mortgage calculators, and while I can understand their desire for how long the mortgage will last and current interest rate (and can someone tell me how to find that out?) they also seem to require arcane information (Prime Weekly Bi-Section Flummox Rate or what have you) that I can’t fathom, let alone find. Thanks! ---
**Author:** ![ultrafilter](https://avatars.discourse-cdn.com/v4/letter/u/3d9bf3/32.png) [@ultrafilter](https://boards.straightdope.com/u/ultrafilter)\ **Post date:** [July 19, 2006, 9:57pm UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/2 "2006-07-19T21:57:39Z")
Best to ask a banker. You really do need the sorts of information that they’ll have ready access to. ---
**Author:** ![cmosdes](https://avatars.discourse-cdn.com/v4/letter/c/a587f6/32.png) [@cmosdes](https://boards.straightdope.com/u/cmosdes)\ **Post date:** [July 19, 2006, 10:20pm UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/3 "2006-07-19T22:20:24Z")
There are lots of places on the web to find a mortgage calculator that doesn’t need anything more than just Principal, interest and term to determine payment amount. [Here](http://www.calculator.com/pantaserv/mortgage.calc) is one. To get to a principal from payment, you can simply change the principal until you approximate the payment you want. Unfortunately I can’t find a calculator to do this directly right now, but I know they exist. Lending rates can be found simply by checking several banks and Credit Unions in your area. Right now something around 6.5% seems to be approximately what you’ll pay. If you want to dig deeper and look at differences between fixed rate and ARM, 15 year vs. 30, etc., then I would suggest you start talking to a banker. Also, bear in mind that the cost of a house is only partially covered by a mortgage. It would be akin to buying a car and thinking the purchase price is the only thing you’ll ever need to pay on it. You will also need to consider utilities, maintenance, taxes, insurance, etc. These can vary wildely. Once again, a banker would be a good resource to help you determine what you can really afford and can help with details of these costs for your area. ---
**Author:** ![Waterman](https://avatars.discourse-cdn.com/v4/letter/w/b2d939/32.png) [@Waterman](https://boards.straightdope.com/u/Waterman)\ **Post date:** [July 19, 2006, 11:35pm UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/4 "2006-07-19T23:35:44Z")
I would simply like to emphasize that monthly payments should be considered as P+I+T (not just P+I) where the P represents repayment of principal, I is payment of interest and T is payment of real estate taxes. You can compute the contribution of T on P by finding out the tax rate (per dollar of assessed value) and also the percent of market value that houses in that municipality are assessed at. ---
**Author:** ![iamthewalrus\_3](https://avatars.discourse-cdn.com/v4/letter/i/258eb7/32.png) [@iamthewalrus\_3](https://boards.straightdope.com/u/iamthewalrus_3)\ **Post date:** [July 20, 2006, 12:00am UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/5 "2006-07-20T00:00:47Z")
If you want to do some rough calculations, [bankrate.com](http://www.bankrate.com/brm/default.asp) has current rates and some calculators. It’s also a nice resource for finding high yield CDs. ---
**Author:** ![astro](https://avatars.discourse-cdn.com/v4/letter/a/9dc877/32.png) [@astro](https://boards.straightdope.com/u/astro)\ **Post date:** [July 20, 2006, 12:43am UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/6 "2006-07-20T00:43:01Z")
[Here’s a table correlating house cost to necessary monthly income that will give an approx estimate](http://www.mtgprofessor.com/A%20-%20Purchasing%20a%20House/how_much_house_can_you_afford.htm) It addresses the following categories > [@](#): > > To Spend This Amount on a House… > > You Need At Least This > > Gross Monthly Income… > > To Cover This Monthly Housing Expense… > > Other Monthly Debt Payments Should Not Exceed… > > And You Need at Least This Much Cash… > > For the Down Payment Lenders Are Likely to Require… > > And the Closing Costs ---
**Author:** ![sciurophobic](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@sciurophobic](https://boards.straightdope.com/u/sciurophobic)\ **Post date:** [July 20, 2006, 1:51am UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/7 "2006-07-20T01:51:58Z")
[QUOTE=John Corrado] Is there any easy and quick way to figure out how much of a total mortgage one can generally afford based on how much one can afford to pay as a monthly payment? That is, if I pay X amount each month in rent, I can afford a house of Y\*X value without increasing my monthly payment. [/QUOTE] According to **Homebuying for Dummies** , multiply your monthly rent by 200. Once you factor in the tax savings your monthly payments will be about the same. ---
**Author:** ![ZipperJJ](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/zipperjj/32/211_2.png) [@ZipperJJ](https://boards.straightdope.com/u/ZipperJJ)\ **Post date:** [July 20, 2006, 1:54am UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/8 "2006-07-20T01:54:09Z")
[QUOTE=Waterman] I would simply like to emphasize that monthly payments should be considered as P+I+T (not just P+I) where the P represents repayment of principal, I is payment of interest and T is payment of real estate taxes. You can compute the contribution of T on P by finding out the tax rate (per dollar of assessed value) and also the percent of market value that houses in that municipality are assessed at. [/QUOTE] Also consider your homeowners insurance and mortgage insurance (PMI?) if required. I pay $675/mo for my mortgage, but then $260/mo for PMI, property taxes and homeowners insurance. The $260 goes into an escrow account and my mortgage company pays taxes and insurance from the escrow when they’re due. ---
**Author:** ![Taran](https://avatars.discourse-cdn.com/v4/letter/t/edb3f5/32.png) [@Taran](https://boards.straightdope.com/u/Taran)\ **Post date:** [July 20, 2006, 2:14am UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/9 "2006-07-20T02:14:13Z")
[QUOTE=sciurophobic] According to **Homebuying for Dummies** , multiply your monthly rent by 200. Once you factor in the tax savings your monthly payments will be about the same. [/QUOTE] This seems kinda high to me. The number it comes up with for me is over twice cost of the house I’m looking at. Granted, I’m looking near Pittsburgh where houses are dirt cheap, but still. ---
**Author:** ![Gfactor](https://avatars.discourse-cdn.com/v4/letter/g/9de053/32.png) [@Gfactor](https://boards.straightdope.com/u/Gfactor)\ **Post date:** [July 20, 2006, 2:49am UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/10 "2006-07-20T02:49:51Z")
This guy has some good columns on this topic (including an answer to the meta-question, Why Do Different Affordability Calculators Provide Markedly Different Answers to the Question of How Much You Can Afford to Pay?): [http://www.mtgprofessor.com/purchasing\_a\_house.htm](http://www.mtgprofessor.com/purchasing_a_house.htm) ---
**Author:** ![handsomeharry](https://avatars.discourse-cdn.com/v4/letter/h/e9c0ed/32.png) [@handsomeharry](https://boards.straightdope.com/u/handsomeharry)\ **Post date:** [July 20, 2006, 1:02pm UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/11 "2006-07-20T13:02:47Z")
A simple rule of thumb is 40 percent of your income can go to house payments. ---
**Author:** ![Annie-Xmas](https://avatars.discourse-cdn.com/v4/letter/a/ecc23a/32.png) [@Annie-Xmas](https://boards.straightdope.com/u/Annie-Xmas)\ **Post date:** [July 20, 2006, 1:15pm UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/12 "2006-07-20T13:15:29Z")
We tell people they can borrow up to 2 1/2 times their combined income. That’s only a very rough guide. ---
**Author:** ![engineer\_comp\_geek](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/engineer_comp_geek/32/504_2.png) [@engineer\_comp\_geek](https://boards.straightdope.com/u/engineer_comp_geek)\ **Post date:** [July 20, 2006, 3:09pm UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/13 "2006-07-20T15:09:47Z")
The rule I’ve always heard is that no more than 1/3 of your take home pay (after taxes) should go towards your mortgage. Another very rough rule of thumb is that if the house costs $150,000, your monthly payment is going to be in the neighborhood of $1,500 (just divide by 100). You can get more accurate numbers using a mortgage calculator, but for some quick and dirty numbers you don’t get much more simpler than that. ---
**Author:** ![Gfactor](https://avatars.discourse-cdn.com/v4/letter/g/9de053/32.png) [@Gfactor](https://boards.straightdope.com/u/Gfactor)\ **Post date:** [July 20, 2006, 3:30pm UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/14 "2006-07-20T15:30:24Z")
> [@](#): > > The affordability calculation is fairly complex when done correctly, and some approaches oversimplify it. The calculation also involves a number of assumptions that affect the answer. > > To do it properly, affordability must be calculated three times using three different rules. I call these the “income rule”, the “debt rule”, and the “cash rule.” The final figure is the lowest of the three. When affordability is measured on the back of an envelope, which real estate brokers often do, usually it is based on the income rule alone, ignoring the other two. This can result in error. [http://www.mtgprofessor.com/A%20-%20Purchasing%20a%20House/differences\_in\_affordability\_calculations.htm](http://www.mtgprofessor.com/A%20-%20Purchasing%20a%20House/differences_in_affordability_calculations.htm) ---
**Author:** ![Turek](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/turek/32/18782_2.png) [@Turek](https://boards.straightdope.com/u/Turek)\ **Post date:** [July 20, 2006, 3:40pm UTC](https://boards.straightdope.com/t/is-there-an-easy-way-to-figure-out-how-much-i-can-spend-on-a-house/365245/15 "2006-07-20T15:40:51Z")
[QUOTE=ZipperJJ] Also consider your homeowners insurance and mortgage insurance (PMI?) if required. I pay $675/mo for my mortgage, but then $260/mo for PMI, property taxes and homeowners insurance. The $260 goes into an escrow account and my mortgage company pays taxes and insurance from the escrow when they’re due. [/QUOTE] PMI can be avoided by financing 80% or less of the mortage, or by having two mortgages with different lenders. When I bought my first house, I put 5% down, financed 80% with one lender and 15% with a different one. Paying PMI is pouring water down a well. Avoid it if possible.