How to determine how much to charge your business for rent (in your house)?
Your best approach is to assess rent levels in your local area for offices of a similar size. You need to take into account all the usuals - amenities, parking, etc, just as if your home-office was provided by a third-party. Get your $/sq ft and work out the monthly amount. With this figure, you need to then work out what % of it you can charge. If the space is used exclusively for the business, charge 100%. If it's used about half the time, charge 50%, etc. I would strongly advise you to do two things - 1. make sure your accountant and your attorney help you get this squared away. 2. document everything about how you arrived at the cost. Nothing fancy, but dates, realtors, addresses, $/sq foot. A simple table will do. By doing these two things, if the IRS should come around to chat, you should be covered. "If you are talking about a home office, you don't ""charge"" the business anything. If the area is used exclusively as an office you pro-rate by square footage just the actual expenses.  TurboTax recent published an article ""Can I Take the Home Office Deduction?"" which is a must read if you don't understand the process. (Note: I authored said article.)" In Canada I think you'd do it as a % of square footage. For example: Then you can count 20% of the cost of the of renting the apartment as a business expense. I expect that conventions (i.e. that what's accepted rather than challenged by the tax authorities) may vary from country to country. "In the UK it all comes down to what HMRC will allow you to charge without taxing you on the ""rent profit"" and not hitting capital gain tax when you sell the house, it may not all count as your ""main home"" if some is rented out.   (http://www.accountingweb.co.uk/ is a good place to ask this type of questions in the uk)" It depends on the structure of your business. Are you a sole proprietor filing Schedule C on your 1040, or an S-corp, or part of a partnership? The treatment of a home office will differ depending on business entity. To be confident in your solution, and get the best solution for you, consult a local accountant, preferably one who is specialized in taxes for businesses.  Or muddle through the code and figure it out for yourself.  The primary advantage in consulting with an accountant is that you can ask them to point out ways you can restructure your expenses, debts and income in order to minimize your tax burden.  They can help you run the numbers for the various options and choose the one that is right, numerically.
There are many ways to value a business. Here is a simple method to get a ball park number on most businesses. This business is made of two parts. For the real estate: For the business:  I would consider this type of small business riskier than the stock market and so you should expect a higher return. Maybe 15 or 20%? If the rental business makes $50k profit (not revenue) and that is 20% return of your investment, the business is worth $250k. If the business makes no money or if they only make money because they don't take a salary then this is a hobby and not a business. There's no business to buy here and you are just bidding on the real estate to do with what you please. The assets worth $600k and the business worth $250k would be added together for a fair sale price of $850k. Adjust for your actual numbers and you should be able to get a ball park of what you think the business is worth. If you do the math and it works out that you'll make 1-3% on your business, compare that to investing in other places. If it works out that you'll make 40% on your money that's pretty awesome too. It actually depends on the services provided. If you're renting through AirBnB, you're likely to provide much more services to the tenants than a traditional rental. It may raise it to a level when it is no longer a passive activity. See here, for starters: Providing substantial services.   If you provide substantial services   that are primarily for your tenant's convenience, such as regular   cleaning, changing linen, or maid service, you report your rental   income and expenses on Schedule C (Form 1040), Profit or Loss From   Business, or Schedule C-EZ (Form 1040), Net Profit From Business. Use   Form 1065, U.S. Return of Partnership Income, if your rental activity   is a partnership (including a partnership with your spouse unless it   is a qualified joint venture). Substantial services do not include the   furnishing of heat and light, cleaning of public areas, trash   collection, etc. For information, see Publication 334, Tax Guide for   Small Business. Also, you may have to pay self-employment tax on your   rental income using Schedule SE (Form 1040), Self-Employment Tax. For   a discussion of “substantial services,” see Real Estate Rents in   Publication 334, chapter 5 They are two different animals. When you rent you are purchasing a service.  The landlord, as your service provider, has to make a profit, pay employees to do maintenance, and buy materials. The price of these things will increase with inflation, and that rolls into your rent price. Taxes also are passed to the tenant, and those tend to only go upward. Market forces of supply/demand will drive fluctuation of prices as well, as other posts have described. When you buy, you are purchasing just the asset - the home. This price will also be driven by supply/demand in the market, but don't try to compare it to buying a service. Cheers! "You are suggesting that a 1% return per month is huge. There are those who suggest that one should assume (a rule of thumb here) that you should assume expenses of half the rent. 6% per year in this case. With a mortgage cost of 4.5% on a rental, you have a forecast profit of 1.5%/yr. that's $4500 on a $300K house. If you buy 20 of these, you'll have a decent income, and a frequently ringing phone. There's no free lunch, rental property can be a full time business. And very lucrative, but it's rarely a slam dunk.  In response to OP's comment - First, while I do claim to know finance fairly well, I don't consider myself at 'expert' level when it comes to real estate.  In the US, the ratio varies quite a bit from area to area. The 1% (rent) you observe may turn out to be great. Actual repair costs low, long term tenants, rising home prices, etc. Improve the 1.5%/yr to 2% on the 20% down, and you have a 10% return, ignoring appreciation and principal paydown. And this example of leverage is how investors seem to get such high returns. The flip side is bad luck with tenants. An eviction can mean no rent for a few months, and damage that needs fixing. A house has a number of long term replacement costs that good numbers often ignore. Roof, exterior painting, all appliances, heat, AC, etc. That's how that ""50% of rent to costs"" rule comes into play." "You don't need an ""MBA"" to evaluate the performance of a bar.   There is usually a dumb ratio for any industry which sets the expected turnover and bottom line. Basically one figure that can be given to an experienced bar owner and he'll know that the top and bottom line should be. Not knowing the bar industry, your area or grade of location etc I'd guess cost of sales (i.e. drink), you apply that against the typical gross margin % and you'll know what the turnover figure should be, and apply it to the typical net profit % and know what the bottom line should be. Wouldn't surprise me if an experienced guy could figure all that out just from the floorspace area and rent, with a bit of local knowledge.  It should go without saying that if these are underperforming, it doesn't tell you why. Maybe your manager is swindling you, maybe he's crap, maybe the owners took crappy decisions like inappropriate fit out, crap marketing, crap location, etc, forcing manager to price low.  Also bear in mind that the average includes all the really experienced bar owners so it can already be a tough target." I think what you have here is actually TWO agreements with your sister, and explicitly splitting it into two agreements will bring some clarity. The first is ownership of and responsibility for the building. The second is each of your personal use of a unit.  Here's what you do: Treat ownership as if you're not living there. Split the down payment, the monthly mortgage, taxes and insurance, responsibility for cost of maintenance, etc. as well as the ownership and benefit of the building 70%/30%. Put all that in a contract. Treat it like a business. Second, lease those units to yourselves as if you were tenants. And yes, I means even with leases. This clarifies your responsibilities in a tenant capacity. More to the point, each of you pays rent at the going rate for the unit you occupy.   If rent from all three units equals the monthly expenses, nothing more needs to be done. If they're more than the monthly expenses, then each of you receives that as business income on that 70%/30% breakdown. If those three rents are less than the monthly expenses, then each of you are required to make up the difference, again at 70%/30%.  Note: if any of those expenses are utilities, then they should be apportioned via the rent -- just as you would if you'd rented out the whole building to strangers.  2nd note: all that can be done with ledger entries, rather than moving money around, first as rent, then as expense payments, then as payouts. But, I think it will benefit all of you to explicitly pay rent at first, to really clarify your dual relationship as joint owners and as tenants.  Final note: I think this is a stickier situation than you may think it is. Familial relationships have been destroyed both by going into business together, and by renting to family members. You're doing both, and mixing the two to boot. I'm not saying it will destroy your relationship, but that there's a solid risk there. Relationship destruction comes from assumptions and vague verbal agreements. Therefor, for the sake of all of you, put everything in writing. A clear contract for the business side, and clear leases for the tenant side. It's not about trust -- it's about understood communication and positive agreement on all important points. "What you charge them depends on what kind of use you want them to have of the house.  Your use of the term ""roommate"" implies you're imagining, well, a roommate-type situation where everyone has full access to all common areas.  This is the usual situation when multiple people jointly rent a house that none of them owns.  In this situation all the roommates are essentially equals. But if you own the house and are renting it out, you can do whatever you want.  A lot of people would not look for ""roommates"" but for ""lodgers"" or ""tenants"" --- you rent one room to a person, and you decide what the terms are for their use of the rest of the house.  That means you get to decide if/when they use the kitchen, if/when they get to use your dishes, what they can do in the back yard, etc.  In this situation the roommates are not your equals.  You own the property and you set the terms for everyone else.  (To clarify after reading the other answer: by ""not your equals"" I don't mean to imply that renters aren't equal as human beings to the landlord or should be treated as lowly peasants or anything like that.  I just mean that they need not have equal decision-making powers with regard to the housing itself.) I would say the big difference is the social dynamic: personally, I wouldn't feel comfortable renting out rooms to ""roommates"" unless I was quite sure I would get along with them --- basically, the kind of people I would actually rent with, not just rent to. If you do rent roommate-style, and everyone has essentially equal access to all the facilities of the house, I'd say it's reasonable to split all house expenses roughly equally (with perhaps some adjustments for differences in amenities, like if one person has a larger bedroom than others).  If you rent tenant-style, where you're not expecting them to be your buddies, the best way to determine a reasonable rent is to find other people renting similar rooms and see how much they're charging.  Craigslist is a great way to do that; you can also ask around to people you know." I suggest that you first decide on what %'s of the home value you each have a legal claim to. Then split the mortgage using the same %'s. Then, if someone feels their % is slightly higher, they are compensated because they 'own' a correspondingly higher share of the house. Use the same %'s for downpayments (which may mean that an 'adjustment' payment might be required to bring your initial cash outlay from 70/30 into the %'s that you agree to). Tenant income gets split the same way. Utilities are a bit more difficult - as heating depends more on square feet, but water and hydro depend more on how many people are there. You can try to be really precise about working out the %'s, or just keep it simple by using the same %'s as the mortgage. Rent should be nailed to costs + a pre-defined profit limit. Anything above the profit margin gets taxed away.  Instead, people are gouged of a good portion of their incomes while landlords make out like bandits.  Although I imagine the response to such a scheme would just be convoluted accounting tricks. Your calculations are good as far as they go, but there are lots of other factors and pros and cons to each decision. Yes, you should certainly compare the monthly rent to what your mortgage payments would be, as you have done. Yes, you should consider how long you might live there. If you do move out, how difficult will it be to sell the house, given market conditions in your area? If you try to rent it, how difficult is it to find a tenant, and what rent could you expect to receive? Speaking of moving out and renting the place: Who will manage the property and do maintenance? Would you still be close enough to do this yourself? Would you be willing and able to spend the time? Or would you have to hire someone? Also, what if the tenant does not pay the rent? How difficult is it to evict someone in your area? Speaking from personal experience, I own a rental property in Ohio, and the law says you can evict someone with 3 days notice. But in practice they don't just leave, so then you have to take them to court. It takes months to get a court date and months longer before the police actually show up to order them out of the house. And you have to pay the lawyer and court fees. In that time they're living in your property rent free. In my case one tenant also totally trashed the place and stole everything that wasn't nailed down -- I had to spend $13,000 on repairs to a house worth a fraction of what you're talking about. Being a landlord is NOT just a matter of sitting back and collecting rent checks: there's a fair amount of work and a lot of risk. What do you have to pay the realtor, and what other closing costs would you have to pay? Where I live, realtors typically charge 6 to 7%. You may also have to pay for an appraisal, title search, and bunch of other little fees. Mortgage interest is deductible on your federal income taxes. Rent is not. If you own and something needs to be repaired, you have to pay for it. If you rent, the landlord has to pay for it.  If you own, you can do pretty much what you like with the property -- subject to zoning ordinances and building codes and maybe homeowners association rules, but you should have a pretty good amount of leeway. If you want to install ceiling fans or remodel the kitchen or add a deck, it's up to you. If you're renting, it's up to the landlord to decide what you can do to the property. And if he agrees to let you do some upgrade, when you're done, it belongs to him. With a condo, you are not usually responsible for exterior maintenance, like mowing the lawn and trimming the bushes and washing the outer walls. With a house, you are. You might pay someone to do this, which adds to the cost, or you might do it yourself, which takes time. Insurance on a condo or aparment is much less than insurance on a house. In my area, anyway. You should investigate those costs. If you buy, eventually you own the place and don't have to pay a mortgage any more. If you rent, you continue to pay forever. (Even if you don't live in the same house forever, as long as you don't take a terrible loss when you sell you should then have some money left over to apply to the next house, so you are still building equity.) Some of these pros and cons are easily quantifiable. Others are probabilities, like how likely is it that your water heater will fail?, and how long is it likely to take to find a buyer if you want to sell? And others are pretty subjective. "For US punters, the Centre for Economic and Policy Research has a Housing Cost Calculator you can play with.  The BBC provides this one for the UK. For everyone else, there are a few rules of thumb (use with discretion and only as a ball-park guide): Your example of a Gross Rental Yield of 5% would have to be weighed up against local investment returns. Read Wikipedia's comprehensive ""Real-estate bubble"" article. Update: spotted that Fennec included this link at the NY Times which contains a Buy or Rent Calculator." A good quick filter to see if a property is worth looking at is if the total rent for the property for the year is equal to 10% of the price of the property.  For example, if the property is valued at $400,000 then the rent collected should be $40,000 for the entire year.  Which is $3,333.33 per month. If the property does not bring in at least 10% per year then it is not likely all the payments can be covered on the property.  It's more likely to be sinking money into it to keep it afloat. You would be exactly right, as you have to figure in insurance, utilities, taxes, maintenance/repair, mortgage payments, (new roof, new furnace, etc), drywall, paint, etc. Also as a good rule of thumb, expect a vacancy rate of at least 10% (or 1 month) per year as a precaution. If you have money sitting around, look into Real Estate Investment Trusts.  IIRC, the average dividend was north of 10% last year.  That is all money that comes back to you.  I'm not sure what the tax implications are in Australia, however in Canada dividends are taxed very favourably.  No mortgage, property tax, tenants to find, or maintenance either. "The value of getting into the landlord business -- or any other business -- depends on circumstances at the time. How much will it cost you to buy the property? How much can you reasonably expect to collect in rent? How easy or difficult is it to find a tenant? Etc. I owned a rental property for about ten years and I lost a bundle of money on it. Things people often don't consider when calculating likely rental income are: There will be times when you have no tenant. Someone moves out and you don't always find a new tenant right away. Maintenance. There's always something that the tenant expects you to fix. Tenants aren't likely to take as good a care of the property as someone who owned it would. And while a homeowner might fix little things himself, like a broken light switch or doorknob, the tenant expects the landlord to fix such things. If you live nearby and have the time and ability to do minor maintenance, this may be no big deal. If you have to call a professional, this can get very expensive very quickly. Like for example, I once had a tenant complain that the water heater wasn't working. I called a plumber. He found that the knob on the water heater was set to ""low"". So he turned it up. He charged me, I think it was $200. I can't really complain about the charge. He had to drive to the property, figure out that that was all the problem was, turn the knob, and then verify that that really solved the problem. Tenants don't always pay the rent on time, or at all. I had several tenants who apparently saw the rent as something optional, to be paid if they had money left over that they couldn't think of anything better to do with. You may get bad tenants who destroy the place. I had one tenant who did $10,000 worth of damage. That include six inches deep of trash all over the house that had to be cleared out, rotting food all over, excrement smeared on walls, holes in the walls, and many things broken. I thought it was disgusting just to have to go in to clean it up, I can't imagine living like that, but whatever. Depending on the laws in your area, it may be very difficult to kick out a bad tenant. In my case, I had to evict two tenants, and it took about three months each time to go through the legal process. On the slip side, the big advantage to owning real estate is that once you pay it off, you own it and can continue to collect rent. And as most currencies in the world are subject to inflation, the rent you can charge will normally go up while your mortgage payments are constant." Nofel. So basically I wanted to know how to calculate that how much should I be paying for car or rent etc? I'm not big on percentages.  Instead, I prefer hard numbers based on what you owe and what you earn. Here are rules of successful budgeting which I developed when deep in debt.  They apply to everyone: After going through this exercise, you definitely might realize that you need to move to a less expensive apartment, or trade your car in for something smaller, drink less, etc. Or even get a second job. "First of all to answer the basic question ""Is one method correct? Might it depend on local laws?"" Yes it does depend on local laws. Because ultimately the business will have to file forms with the sate/county/city.  These forms are going to ask for the total sales based on the tax category (tax free, x%, y%). Each transaction could have parts that fall into each category. The local taxing authority decides what goes into each category. The local taxing authority also determines how often the business needs to submit the taxes. They can even decide to base the rates used by where the customer lives.  A business is not required to charge directly for sales tax. That is why frequently at sporting events, the price on the menu notes that all sales taxes are included. I suppose not directly charging a sales tax makes the monthly calculation harder, but the state will still get their money. Rounding up at the end of the entire transaction is enough to make sure they collect enough taxes, so they don't have to dip into their profits."