How U.S. Depreciation works Explain in brief?
If a business tool has a limited lifespan, it's value decreases (depreciates) from year to year. The business can capture that loss of value on some things that it couldn't otherwise write off as expenses. A few tools can be either expenses or depreciated, but only one of those can be chosen for that particular object. This is generally not relevant for individual taxpayers, unless you can show that the item is being used for income-producing purposes.
"FTA: ""Verizon would give up its television and Internet landline business known as FiOS, which has been a cable alternative for 14 million U.S. homes.""  Somebody explain to me !!! WTF does it mean? Are they going to give FiOS over to Comcast?" Either way, (lease or buy), it's likely going to be an expense, not a depreciation. You would expense the entire lease amount - whatever that is in the year it was paid. A $2k-$3k computer probably isn't worth the trouble of recording it as a Fixed Asset and depreciating it yearly. I work for a company that buys thousands of PCs a year for its employees and we have a hard rule: If it's under $3k, it's an expense not an asset. If you were buying $20k-$50k servers, this would be a different conversation both because of the price and the life of the item. Because it's such a small amount (unless you really are buying $20k PCs), it doesn't really matter whether it's your biggest expense or not, it's likely just an expense. Though, no one is preventing you from depreciating it over 5 years if you wanted to. See: https://www.irs.gov/help-resources/tools-faqs/faqs-for-individuals/frequently-asked-tax-questions-answers/sale-or-trade-of-business-depreciation-rentals/depreciation-recapture/depreciation-recapture In summary: I would say your question is more of a business sense question than a tax question. Is it worth it to you to lease instead of buying because you are getting a new PC so often? Btw: every 2 years is not that often. It's average. Whatever your decision, I think the answer for taxes is the same: Expense it all in the year it was incurred unless you really want to spread it out and depreciate. At the time of writing, the Canadian dollar is worth roughly $0.75 U.S. Now, it's not possible for you to accurately predict what it'll be worth in, say, ten years. Maybe it'll be worth $0.50 U.S. Maybe $0.67. Maybe $1.00. Additionally, you can't know in advance if the Canadian economy will grow faster than the U.S., or slower, or by how much. Let's say you don't want to make a prediction. You just want to invest 50% of your money in Canadian stocks, 50% in U.S. Great. Do that, and don't worry about the current interest rates. Let's say that you do want to make a prediction. You are firmly of the belief that the Canadian dollar will be worth $1.00 U.S. dollar in approximately ten years. And furthermore, the Canadian economy and the U.S. economy will grow at roughly equal rates, in their local currencies. Great. You should put more of your money in Canadian stocks. Let's say that you want to make a prediction. The Canadian economy is tanking. It's going to be worth $0.67 or less in ten years. And on top of that, the U.S. economy is primed for growth. It's going to grow far faster than the Canadian economy. In that case, you want to invest mostly in U.S. stocks. Let's get more complicated. You think the Canadian dollar is going to recover, but boy, maple syrup futures are in trouble. The next decade is all about Micky Mouse. Now what should you do? Well, it depends on how fast the U.S. economy expands, compared to the currency difference. What should you do? I can't tell you that because I can't predict the future. What did I do? I bought 25% Canadian stocks, 25% U.S. stocks, 25% world stocks, and 25% Canadian bonds (roughly), back when the Canadian dollar was stronger. What am I doing now? Same thing. I don't know enough about the respective economies to judge. If I had a firm opinion, though, I'd certainly be happy to change my percentages a little. Not a lot, but a little. Others have already made good points, so I'll just add a few more: You say that if you bought it, your mortgage, insurance, and taxes minus the rental income from the bottom floor would leave you with costs of 1/4 of your current rent. That means you're getting a fantastic deal on the purchase price. I suspect you may be underestimating some of those costs. So, get exact figures on the mortgage, insurance and taxes and do the math. If it is that good, go for it, just make sure to get that home inspection (in case there's major problems and they're trying to get out while the gettin's good) Also, some advice: Be prepared to cover that entire monthly cost for a few months. Units can stand empty for a while. Also, you may want to rent out slowly - a good tenent found after a couple months is much better than a bad tenent found quickly. Also, have some money set aside for maintenence. As a renter, you've never really had to think about that before, but as a homeowner you do. As a landlord, it's even more important - you can not fix something in your own home for a while if you needed to wait, but in a tenent unit, you have to fix it immediately.  Finally, taxes: You do get to deduct interest, and so on, but it'll work a little differently than you think. You'll have to split it in half (if the units are the same size) and deduct half the interest as a normal homeowner deduction, the other half as a business expense. Same for PMI, insurance, and property taxes. If you do maintenance that effects both units, like fixing the roof, half will be deductible, the other half not. However, maintenance that only affects the tenant unit is fully deductible.  You can claim depreciation, but only for half. So, your starting amount you can depreciate would be (purchase price - land value)/2. Same thing here - half is your home, the other half is a business.  Note that some things you'd think of as maintenance costs actually can't be deducted, only depreciated over time. Take that leaky roof, for example. If you replaced it instead of repairing it, you could not deduct your replacement costs. It counts as an improvement, and gets added to your cost-basis, where you depreciate it along with (half!) the house.  If your tenant's refrigerator went out, and you replaced it, you couldn't deduct that either. However you can depreciate all of it on another schedule (seperate from home depreciation). If you repaired it instead, you can deduct all of it immediately.  Taxes suck. Straight line depreciation is marginal as far as I understand. It would be a flat expense each year. Unless you mean 2 mil year one and 4 mil for years one and two combined and it's just written ambiguously here. It seems pretty straight-forward to me. 10 mil rev per year operating increase. 6.5 mil operation expense increase. Net income= rev-expenses. Depreciation expense is not an operating expense. As far as relevant cash flows I guess if there's not omitted info in this post would just be the cash for the initial investment, the added expenses, the added revenue, the salvage sale. One key piece missing from your theory is the bid/ask spread. If you buy a stock for $10, you usually can't immediately turn around and sell it for $10. You can only sell it for whatever someone is willing to pay for it.  So virtually any random investment (stocks, bonds, forex, whatever) immediately loses a small amount of value, and over the long run you will almost certainly lose money if you buy/sell at random. This was such a wonderful and clear explanation. It has helped me to understand (at 28) a concept that I have always been a bit murky on. I would feel safe making the bet that you are a teacher of some sort. I would find it extremely interesting to hear you thoughts on why we don't use the gold standard anymore. Do you work in finance? "What do you mean by 'make'?  I am in the US, but I'm sure it's typical that any business has a ""bottom line"", the profit after all costs including paper losses for things like depreciation. This is then taxed, either at the business level or to the individual. The individual's person expenses don't come into play, unless those expenses are tied to the business, e.g. Some kind of function at their house which includes clients/customers."