The accrual concept in accounting stipulates that revenue should be recognized when it is earned, regardless of when payment is received, and costs should be recognized when they are incurred, regardless of when payment is made. This means that revenue and expenses should be recorded in the period in which they occur, not when cash is received or paid. The accrual concept ensures that financial statements reflect the actual performance of the company during a specific period and helps to provide a more accurate picture of the company's financial position.