- Payment Terms
- The agreed conditions under which a buyer must pay a seller, including the due date, acceptable payment methods, and any early-payment discounts.
- Net 30 / Net 15
- Payment terms requiring the full invoice amount to be paid within 30 or 15 days of the invoice date.
- Late Fee
- An additional charge assessed on outstanding balances that remain unpaid past the due date, typically expressed as a monthly percentage.
- Retainer
- An upfront fee paid by a client to reserve a provider's services or time for a defined period, typically billed monthly.
- Disbursement
- A third-party cost β such as postage, filing fees, or travel expenses β that a service provider incurs on a client's behalf and passes through on an invoice.
- Credit Note
- A document issued to reduce or cancel a previously issued invoice, used when a refund, billing error, or service adjustment is required.
- Collections
- The process of pursuing payment on overdue invoices, which may include reminder notices, suspension of services, or referral to a collections agency.
- Dispute Window
- The number of days after invoice delivery within which a client may formally contest a charge β typically 7 to 30 days.
- Scope Creep
- The gradual expansion of deliverables or work beyond what was originally agreed, which must be captured in a change order to trigger additional billing.
- Change Order
- A written amendment to a service agreement that documents additional work, adjusts the project scope, and specifies the associated additional fee.