Web agency billing mixes retainers, milestones, and expenses. Everhour turns tracked work into client-ready invoices.
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Web agencies usually invoice against a proposal, statement of work, or service agreement. The invoice should mirror that agreement, whether the job is hourly development, a fixed-price website, a milestone payment, or a monthly retainer for maintenance and optimization. Use the same service language from the quote so the client can connect each charge to the approved scope.
A practical web agency invoice identifies the seller and buyer, invoice date, unique invoice number, services, quantities, rates, applicable tax, total, due date, and payment method. Add the project name, PO number, or contract reference when the client requires it. For a retainer, list the billing period. For project work, tie the line item to the milestone, sprint, page template, or deliverable.
Hourly billing fits evolving scopes, support queues, and development work where requirements change during delivery. A line item can read: "Frontend development, June 1 to June 15, 32 hours at $95 per hour." That gives the client the service, date range, quantity, rate, and amount without forcing them to decode internal task names.
Fixed-price and milestone invoices need different detail. A website redesign can bill 40% at kickoff, 30% after prototype approval, and 30% at launch. Recurring retainers commonly cover monthly design updates, A/B testing, performance optimization, and continuous UX improvements. Reimbursable expenses, such as approved plugin licenses or stock assets, belong on the next invoice with receipts tied to the client or project.
United States private-sector invoices do not follow one prescribed federal form, and the United States does not use a national VAT or GST invoice regime. Sales and use tax is imposed by state and local jurisdictions. Service taxability also varies by state and service type, so a web agency should apply tax only where the applicable state and local rules require it.
Payment terms need the same clarity as scope. Seven-day payment terms have become more common, while larger clients often require their own terms. Late fees should appear in the quote or service agreement before work starts, then match the invoice language. Online payment options can speed collection, but the invoice should still state who pays processing fees if that matters to the agreement.
A one-off invoice works when a web agency has one project, one client, and a simple set of approved charges. It is enough for a deposit request, a fixed milestone, or a clean monthly retainer where the amount never changes. Manual entry becomes risky when several people bill time across design, development, QA, project management, and client support.
Everhour Billing & Invoicing fits the managed workflow: tracked billable time and expenses become invoices, rates calculate the invoice amount, and non-billable tasks stay out of the client total. Client settings can hold contacts, taxes, discounts, and payment terms, while invoices can be exported to QuickBooks Online, Xero, or FreshBooks with status syncing back to Everhour.
This content is for general information only, may not be fully up to date, and is provided without any warranty or liability.
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Hourly billing fits open-ended work, fixed-price billing fits defined deliverables, milestone billing fits larger builds, and retainers fit ongoing maintenance or optimization. The invoice should follow the proposal or service agreement. Mixed projects can combine a fixed discovery fee, milestone development payments, and hourly change requests when the contract separates each charge clearly.
A web agency invoice should show the buyer and seller, issue date, invoice number, project or PO reference, service descriptions, quantities, rates, applicable tax, total amount due, due date, and payment method. Service descriptions should use the same wording as the quote so the client can match the invoice to the approved scope.
Sales tax treatment depends on state and local rules, nexus, the service or product sold, and where the sale is sourced. The United States has no national VAT or GST invoice regime. Some states tax certain services, and others tax mainly tangible personal property with limited service charges. Apply a tax line only when the applicable jurisdiction requires it.
A web agency can invoice retainers and project work together when the agreement allows it and the line items stay separate. Label the retainer period, then list project milestones, hourly work, or approved expenses below it. Separate lines prevent the client from confusing recurring support with new build work or out-of-scope requests.
The common mistake is using vague line items that do not match the approved quote. "Website work" creates questions. "Checkout template development, milestone 2" gives the client a recognizable deliverable. Missing PO numbers, unclear due dates, late fees added after the fact, and unexplained pass-through expenses also cause avoidable approval delays.
Everhour Billing & Invoicing converts tracked billable time and expenses into invoices, calculates amounts from rates, and excludes non-billable tasks from the client total. Agencies can group invoice lines by project, task, person, date, or another available breakdown before exporting drafts to QuickBooks Online, Xero, or FreshBooks.
Everhour reporting shows billable time, non-billable time, billable amount, cost, invoice status, and project data in customizable reports. Admins can group and filter work by client, project, member, task, or date, then export reports as CSV, Excel/XLSX, or PDF for review and records.
Convert tracked web agency time, expenses, and client terms into invoices without rebuilding timesheets by hand. Everhour connects billing details to invoice exports and status tracking.
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