DISCLAIMER: I AM AN AMATEUR!!!!
Oddly enough, in the US most small-time landlords probably show an income loss on rental properties. This is because you get two big tax write-offs, mortgage interest AND property depreciation. Note that you don't write-off your entire mortgage payment, just the portion that goes to interest.
Here's a "simplified" tax example.
Rent = $1500/month or $18,000/year
Property tax = $1200/year
Condo Fees = $200/month or $2400/year
Insurance = $400/year
Mortgage Payment for Interest = $9,000
Mortgage Payment for Principle = not deductible
Your taxable income BEFORE depreciation is:
18,000 - 1,200 - 2,400 -400 - 9,000 = 5,000
However, you can also deduct depreciation in house value. This is the purchase price less what the land is worth spread over 28 years. So if you bought for $380,000 and the land it's on is worth $100,000 you can say it depreciates $10,000/year (based on (380k-100k)/28). (this gross simplification isnt even right but I tried to make this easier to understand). This makes it actually a tax loss every year:
18,000 - 1,200 - 2,400 -400 - 9,000 -10,000 = -5,000
It's pretty easy to show zero income or less on a rental property as mortgage interest and depreciation add up to a lot. I would avoid showing so much depreciation that your income is negative though as that will cost you more later down the road as when you sell you basically pay tax on claimed depreciation.
Another important tax note is that profits made selling a property you have lived in are tax-free (up to some large amount anyway). If you rent a property you will have to pay taxes on profits when you sell if you didn't live there for 2 of the last 5 years.
Schedule E will show you everything that's counted as expenses for property rentals. Form 4562 gives depreciation info. Publication 527 has good info as well.