For example, if a company buys a distribution center, it will not expense the cost of the distribution center as an expense. But as time goes on it will expense a depreciation expense that accounts for the loss of value of the distribution center as the building gets older, less useful, etc. But buildings last for a long time, and a building with the land it is on never actually goes down to a value of zero. So not all expenses associated with the distribution center will be applied over time.

So capitalizing something definitely helps you get more income.

But, unlike cash, a building doesn't retain its (dollar) value forever, it must be written off. I'm not sure how buildings are written off since they have a rather long "shelf" life, but laptops are generally written off over three year. So if you buy a $1500 laptop with cash in year 0, your profits in year zero are unaffected, but you must book a depreciation (a reduction in the value of your assets) worth $500 in years 1, 2 and 3. Hopefully you will, as with your warehouse, use your new asset to book profits in each of these years in excess of your write-offs.