Accounts Receivable and Accounts Payable: How AR and AP Work, Aging Schedules, and the Entries That Record Them

Accounts Receivable (AR) represents money customers owe your business for goods or services already delivered on credit. It is a current asset. When you sell $5,000 of consulting services on account: debit Accounts Receivable $5,000 (asset increases), credit Service Revenue $5,000 (revenue recognized at point of delivery, not when cash arrives). When the customer pays 30 days later: debit Cash $5,000, credit Accounts Receivable $5,000. Accounts Payable (AP) represents money your business owes suppliers for goods or services received on credit. It is a current liability. When you receive $3,000 of inventory on account: debit Inventory $3,000 (asset increases), credit Accounts Payable $3,000 (liability increases). When you pay 30 days later: debit Accounts Payable $3,000, credit Cash $3,000. The fundamental principle: accrual accounting records revenue when earned and expenses when incurred, regardless of when cash changes hands. AR and AP are the accounting mechanism that makes this possible — they bridge the timing gap between the economic event (sale or purchase) and the cash event (collection or payment). Here is what trips up students: AR and AP are not just accounting concepts — they directly drive working capital and cash flow. A company with $500,000 in AR that takes 60 days to collect needs more cash on hand than one that collects in 30 days, even if their revenue is identical. Managing the timing of AR collections and AP payments is one of the most important operational decisions a business makes. Snap a photo of any AR or AP journal entry problem and AccountingIQ records the transaction, handles discounts and returns, and explains the impact on the balance sheet and income statement.

Credit terms like 2/10, n/30 mean the customer gets a 2% discount if they pay within 10 days, otherwise the full amount is due in 30 days. The entries for discounts are where students lose points. Sales Discount (seller side): Customer buys $10,000 on account with terms 2/10, n/30. At sale: debit AR $10,000, credit Revenue $10,000. If customer pays within 10 days: debit Cash $9,800, debit Sales Discounts $200, credit AR $10,000. Sales Discounts is a contra-revenue account — it reduces gross revenue on the income statement. If the customer pays after 10 days: debit Cash $10,000, credit AR $10,000 (no discount). Purchase Discount (buyer side): You buy $10,000 of inventory with terms 2/10, n/30. At purchase: debit Inventory $10,000, credit AP $10,000. If you pay within 10 days: debit AP $10,000, credit Cash $9,800, credit Inventory $200 (or Purchase Discounts under the periodic system). The discount reduces the cost of the inventory. Sales Returns and Allowances: Customer returns $1,500 of goods. Debit Sales Returns and Allowances $1,500 (contra-revenue), credit AR $1,500. If the goods are resalable, also debit Inventory and credit COGS to reverse the cost side. Students frequently forget the second entry — the cost side of the return. Purchase Returns: You return $1,500 of defective inventory to a supplier. Debit AP $1,500, credit Inventory $1,500. This reduces both the liability and the asset. The key exam trap: net revenue = gross revenue - sales discounts - sales returns and allowances. All three contra-revenue accounts reduce the top line. Exams test whether you know which accounts are contra-revenue and how they flow to the income statement. AccountingIQ handles all discount and return variations — including the tricky scenarios where partial returns happen after a discount was taken.

Not every customer pays. The aging schedule categorizes AR by how long each invoice has been outstanding, then estimates the percentage of each category that will be uncollectible. Typical aging categories and loss percentages (these vary by industry): Current (0-30 days): $200,000 at 1% estimated loss = $2,000. 31-60 days: $50,000 at 3% = $1,500. 61-90 days: $20,000 at 10% = $2,000. 91-120 days: $8,000 at 25% = $2,000. Over 120 days: $5,000 at 50% = $2,500. Total AR: $283,000. Required Allowance for Doubtful Accounts: $10,000. The allowance method (required under GAAP) records bad debt expense BEFORE accounts are actually written off. It uses a contra-asset account — Allowance for Doubtful Accounts — that reduces AR on the balance sheet to its net realizable value (the amount expected to be collected). Adjusting entry: If the current Allowance balance is $3,000 (from prior periods) and the aging schedule says it should be $10,000, the adjusting entry is: debit Bad Debt Expense $7,000, credit Allowance for Doubtful Accounts $7,000. The balance sheet now shows: AR $283,000 minus Allowance $10,000 = Net Realizable Value $273,000. Here is the subtlety that catches students: the aging method calculates the REQUIRED ENDING BALANCE of the Allowance account, not the Bad Debt Expense directly. If the Allowance already has a $3,000 credit balance, you only need to add $7,000 to reach $10,000. If the Allowance has a $1,000 DEBIT balance (from write-offs exceeding prior estimates), you need to add $11,000 to reach the required $10,000 credit balance. Always check the existing Allowance balance before calculating the adjusting entry. AccountingIQ builds aging schedules from AR data, calculates the required allowance, checks the existing balance, and generates the adjusting entry with full explanations.

When a specific customer account is determined to be uncollectible, it is written off. Write-off entry (allowance method): Customer Smith owes $2,500 and has been unresponsive for 6 months. Debit Allowance for Doubtful Accounts $2,500, credit Accounts Receivable — Smith $2,500. Notice: the write-off does NOT affect the income statement. Bad Debt Expense was already recorded when the allowance was estimated. The write-off just moves the loss from the Allowance to AR — net AR on the balance sheet stays the same. Before: AR $283,000 - Allowance $10,000 = NRV $273,000. After writing off Smith: AR $280,500 - Allowance $7,500 = NRV $273,000. Same net realizable value. This is a critical exam concept: under the allowance method, writing off a specific account does NOT affect total assets, net income, or net AR. It reduces both gross AR and the Allowance by the same amount. Recovery: Sometimes a previously written-off customer pays. This requires two entries. Entry 1 (reverse the write-off): debit Accounts Receivable — Smith $2,500, credit Allowance for Doubtful Accounts $2,500. Entry 2 (record the collection): debit Cash $2,500, credit Accounts Receivable — Smith $2,500. Both entries are necessary — the first reinstates the receivable so the customer's account history reflects the collection. Direct write-off method (not GAAP, but tested on exams): some small businesses and tax returns use the direct method, which records bad debt expense only when a specific account is identified as uncollectible. Entry: debit Bad Debt Expense, credit AR. This violates the matching principle (expense is recorded in a different period than the revenue it relates to), which is why GAAP requires the allowance method. But exams test both methods to see if you understand the difference. AccountingIQ handles the full bad debt cycle — aging analysis, allowance adjustment, write-offs, and recoveries — with proper journal entries and balance sheet impact analysis at each step.