What is NSF?

NSF (non-sufficient funds) occurs when a check or electronic payment is returned because the payer's account lacks adequate funds to cover the transaction. For professional service firms, NSF items require reversing the original receipt, assessing fees, and initiating collection.

Key characteristics

• Payment returned unpaid

• Insufficient account balance

• Creates bank fees

• Requires accounting reversal

• May indicate client problems

• Collection effort needed

Why it matters for professional service firms

NSF items reverse what appeared to be collected revenue and create additional costs. They may signal client financial problems requiring attention. Professional service firms should have procedures for handling NSF items, including accounting treatment, fee assessment, and collection follow-up.

Real-world example

Chris deposited an $8,400 client check and recorded the payment. The bank returned the check NSF five days later. Accounting: reversed original payment, reinstated receivable, recorded $35 bank fee. Collection: contacted client, assessed $50 NSF fee per engagement terms, required certified funds for resubmission. Client paid by wire transfer within 48 hours, including fees.