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Customer Payment Time Calculator (Days Sales Outstanding / DSO)

A simple calculator that estimates how many days of sales are currently tied up in Accounts Receivable (A/R).

This calculator estimates customer payment time using current Accounts Receivable (A/R) and sales over the last 12 months. It calculates Days Sales Outstanding (DSO), not generic invoice aging.

The total amount customers currently owe your business for work, products, or services already delivered or billed.

If unpaid customer invoices total $30,000, enter $30,000.

The total sales your business recorded during the most recent 12-month period.

If your business recorded $600,000 in sales during the last 12 months, enter $600,000.

Results

Enter current Accounts Receivable (A/R) and sales over the last 12 months, then choose Calculate to estimate Days Sales Outstanding (DSO).