Basis of accounting
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A basis of accounting can be defined as the time various financial transactions are recorded. The cash basis (EU VAT vocabulary Cash accounting) and the accrual basis are the two primary methods of tracking income and expenses in accounting.
Both can be used in a range of situations from the accounts of a whole country, a large corporation, a small business or an individual. In many cases regulatory bodies may require individuals, businesses or corporations use one method or the other. When this is not the case, the choice of which to use is an important decision as both have advantages and disadvantages.
The accrual method records income items when they are earned and records deductions when expenses are incurred. For a business invoicing for an item sold, or work done, the corresponding amount will appear in the books even though no payment has yet been received – and debts owed by the business show as they are incurred, even though they may not be paid until much later.
In the United States tax environment, the accrual basis has been an option since 1916. An "accrual basis taxpayer" looks to the "all-events test" and "earlier-of test" to determine when income is earned. Under the all-events test, an accrual basis taxpayer generally must include income "for the taxable year when all the events have occurred that fix the right to receive income and the amount of the income can be determined with reasonable accuracy." Under the "earlier-of test", an accrual basis taxpayer receives income when (1) the required performance occurs, (2) payment therefore is due, or (3) payment therefore is made, whichever happens earliest. Under the earlier of test outlined in Revenue Ruling 74-607, an accrual basis taxpayer may be treated as a cash basis taxpayer when payment is received before the required performance and before the payment is actually due. An accrual basis taxpayer generally can claim a deduction "in the taxable year in which all the events have occurred that establish the fact of the liability, the amount of the liability can be determined with reasonable accuracy, and economic performance has occurred with respect to the liability."
Similar definition of accrual basis accounting is true for financial accounting purposes, except that revenue can't be recognized until it is earned, even if a cash payment has already been received by the tax authorities.
Modified accrual basis
Also referred to as the Modified Cash Basis, combines elements of both accrual and cash basis accounting. The modified method records income when they are earned but deductions when expenses are paid out. The recording of income is then of accrual basis, while the recording of expenses is cash basis. The modified method does not conform to the GAAP. 
- Adjusting entries
- Claim of right doctrine
- Matching principle
- Revenue recognition
- Tax accounting
- "Measuring the Deficit: Cash vs. Accrual". Government Accountability Office. Retrieved 19 January 2011.
- "Cash vs. Accrual Accounting", Inc.com
- "Measuring the Deficit: Cash vs. Accrual", GAO.gov
- Treas. Reg., 26 C.F.R. § 1.446-1(c)(1)(ii)
- root. "Accrual Accounting Definition | Investopedia". Retrieved 2015-10-07.
- Treas. Reg., 26 C.F.R. § 1.446-1(c)(1)(ii)(A); Revenue Ruling 74-607
- Revenue Ruling 74-607
- Treas. Reg., 26 C.F.R. § 1.461-1(a)(2)(i)
- "What are Accruals and the Meaning of Accrued in Accounting?". Simplestudies LLC. 25 February 2010. Retrieved 25 February 2010.
- Ernst, James. "3 Methods of HOA Accounting and How They Effect Financial Statements". www.echo-ca.org. ECHO. Retrieved 5 August 2014.