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发表于 2011-7-27 12:34
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The most important thing to remember when trying to understand DTA and DTL is that ultimately all income will be taxed at some point and all expenses will be deducted at some point (of course this is a simplification and not all income/expenses are considered for tax purposes; lets assume however that all income is taxable and expenses deductible; nontaxable income and nondeductible expenses don't affect the DTA/DTL).
Once you realize that all income/expenses are considered eventually, the next question is to decide whether the income/expense is taxable/deductible in the current period or in the future. If it is taxable/deductible in the current period, then it won't affect the DTA/DTL. The company pays its tax owed and everything is nice and easy. If, however, some of the income/expenses are not taxable/deductible now but will be in the future, a DTA or DTL arises.
Although it seems tricky at first, deciding whether an item is a DTA or DTL is actually very easy. We first have to make one basic assumption: companies would prefer to pay less taxes than more. In addition, remember that more income = more tax and more expenses = less taxes. With this in mind, ask yourself: will recording this item in the future result in more or less taxes? If the item results in more tax in the future then the item contributes to the DTL. If the item results in less tax in the future then the item contributes to the DTA (think more tax = bad = liability and vice versa).
Using the same logic from the paragraph above, you can see that income that will be recorded in the future (instead of right now) is bad, it results in more taxes in the future. Therefore income that is deferred (recorded in the future) increases the DTL. On the other hand, expenses that will be deferred are good because expenses reduce the amount of taxes you will pay. Therefore deferred expenses increase the DTA.
The other thing to consider is what happens when DTAs and DTLs reverse. By "reverse" I mean that the income/expense that we previously deferred is now affecting our current taxes. In other words, income that was deferred in the past is now taxable in the current period; expenses that were deferred in the past are now deductible in the current period. When this happens just reverse the DTA or DTL that was previously recorded. So if an income item previously increased the DTL, recording that income in current taxable income will decrease the DTL. If an expense item previously increased the DTA, recording that expense in the current taxable income calculation will reduce the DTA. Keep in mind that a particular question might start out in the middle of this process. In other words, the DTA or DTL may have previously been recorded and the question requires that you now reverse that DTA or DTL.
Because all income/expenses are eventually considered (as I mentioned in the first paragraph), all DTAs and DTLs will eventually reverse. If you looked at a business over the course of its lifetime, the net DTA/DTL would be 0. DTAs and DTLs only result because of temporary differences between book and tax income/expenses.
Hope that helps!
Edited 1 time(s). Last edit at Thursday, July 14, 2011 at 10:03AM by RockGuitar417. |
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