To calculate net accounts receivable, you need: total accounts receivable, allowance for doubtful accounts, and sales returns and allowances. A company's net receivables are the total amount of money its customers owe minus what the company estimates will likely never be paid.Accounts Receivable Turnover measures a business's efficiency in collecting receivables or credit extended to clients. The formula for net credit sales is = Sales on credit – Sales returns – Sales allowances. For instance, if a sale is net 10, you have 10 days from the time of the invoice to pay your balance. How do I calculate Sales Tax? The tax must be collected on the amount of the sale that is taxable. The balance sheet method uses accounts receivable to calculate the ending allowance for bad debt. The calculation matches bad debt with related sales during the period.