Billing and charging

Billable hours are the hours a professional (consultant, lawyer, designer, contractor) worked that can be charged to a specific client at an agreed hourly rate, distinct from non-b...

A discount on an invoice is a reduction applied to a specific line item or to the subtotal, expressed as a percentage or a fixed amount, that reduces the buyer's total and (because...

Gross is the total amount including tax; net is the amount before tax. On an invoice, the gross is what the buyer pays in total, while the net is the supplier's earned revenue (wit...

A line item is a single row on an invoice representing one good or service, with a description, a quantity, a unit price, and the resulting line total; the sum of every line-item t...

Milestone billing is a billing approach where invoices are issued upon completion of defined project milestones (e.g. design sign-off, beta launch, final delivery), rather than on ...

A retainer is a recurring fee a client pays a service provider for ongoing access, reserved capacity, or a defined scope of work delivered on a regular cadence, typically billed mo...

The subtotal on an invoice is the sum of all line items before tax, discounts, fees, or rounding are applied, sitting between the line-item table and the total as the basis for the...

Time and materials (T&M) is a billing model where the client pays for hours worked at an agreed hourly rate plus the pass-through cost of any materials used, contrasted with fixed-...