Invoice app for client projects

Client project billing needs clean time, rates, and tax decisions. Everhour keeps billable work tied to project invoices.

Build your invoice

Fill in your details, add line items, hit Print when ready.

Invoice #
Date
Due date
From
To
DescriptionQtyRateTaxAmount
Subtotal
Tax
Total$ 0.00

Everhour does it all — track, budget, report & invoice

The calculator gives you the number — Everhour takes it from there.

Go ahead — start tracking!

One click and you're timing. Start a timer, add an entry, edit the details. This is exactly how it feels in Everhour.

  • One-click timer — browser, desktop & mobile
  • Works inside Asana, ClickUp, Linear, GitHub & more
  • Simple setup, no learning curve
Works with your favorite tool:
Everhour — Time Tracking
Time Entries
01:24:00
00:31:00
01:07:00

No more budget surprises

Set a budget, assign rates, and get alerted before you're over.

  • Real-time cost tracking
  • Set different rates per person or project
  • Alerts before you hit the budget limit
Everhour — Budgeting
Acme Web Project
1
50% of budget used
$2,500.00of $5,000.00
$2,500.00 remaining
75%
Actual costRemaining cost

Measurement

Track your budget through time or costs

Simple, customizable reports

Every report you need — configured your way, always up to date.

  • See who does what in real time
  • Configure any report
  • Scheduled email reports
Everhour — Reports

Your invoice is ready!

Tracked hours flow straight into a polished invoice — no copy-paste, no manual math.

  • Billable hours straight into the invoice
  • Configure invoice templates
  • Copy invoices to QuickBooks or Xero
  • Invoicing dashboard with status
Everhour — Invoices
Your Company LLChello@yourcompany.com
INVOICE
Invoice #1042
Group by:
DescriptionHoursRateAmount
Website Redesign14h$150/h$2,100.00
Brand Guidelines7h$150/h$1,050.00
Marketing Strategy3.5h$150/h$525.00
Total Due$3,675.00
Try Everhour for real yourself

Client project invoicing basics

Build the client billing record

A client project invoice turns approved work into a bill the client can review, approve, and pay. The invoice should identify the seller and buyer, include a unique invoice number, show the issue date and due date, describe the project work, list quantities and rates, state the subtotal, show any applicable sales tax, and give the total amount due.

For service projects, line items need enough detail to match the contract or statement of work. A line such as "Website redesign, sprint 3, 18 hours at $125 per hour" gives the client a clearer audit trail than "consulting services." Add payment terms, remittance details, and any purchase order or project reference the client requires for approval.

Match rates to project work

Client projects often use different pricing rules inside the same business. One project may bill by hourly member rate, another by fixed fee, and another by task type. The invoice should follow the agreed billing model, since a blended rate, senior consultant rate, or non-billable project-management line changes the amount the client expects to see.

Keep internal cost separate from the client-facing billable rate. Cost shows margin; billable rate creates the invoice amount. A designer who costs $55 per hour and bills at $110 per hour should not have both numbers visible on a client invoice. The client document needs the billable basis, while internal reports need the cost basis for profitability.

Handle tax and payment details

The United States does not use a national VAT or GST invoice regime. Sales and use tax obligations come from state and local rules, and service taxability varies by state and service type. California generally taxes retail sales of tangible personal property and only some service or labor charges, while Texas defines 16 broad taxable service categories.

Private-sector invoices also do not follow one prescribed federal format. For federal tax records, invoices act as supporting documents that show business transactions, gross receipts, and income sources. Federal contracts are different: FAR 32.905 defines proper invoice fields, and FAR 32.904 generally uses a 30-day payment timing standard for most federal contract invoice payments.

Move beyond one-off invoices

A simple invoice tool is enough when you need to bill one client project, send a PDF, and keep the record with the contract. It works for a single fixed-fee milestone, a small hourly job, or a project where someone already reviewed the hours and rates before the invoice was created.

A managed workflow fits recurring client work, multiple contributors, rate changes, and projects with billable and non-billable tasks. Everhour can price billable work by project, member, or task, separate cost and billable rates, and preserve dated rate history so approved time, rates, and invoices stay aligned.

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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G2

Summer 2026

Best Ease Of Use

Capterra

Summer 2026

Loved by teams. Proven everywhere.

Rated in the top time trackers across G2, Capterra, and TrustRadius — with consistent praise for ease of use, integrations, and support.

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Frequently Asked Questions

Which fields matter most on a client project invoice?

A client project invoice needs seller and buyer details, invoice number, issue date, due date, project reference, line-item descriptions, quantities, rates, subtotal, applicable tax line, total due, payment terms, and remittance details. Add a purchase order number when the client requires one for approval.

Should project invoices use hourly lines or milestone lines?

Use the billing model in the contract or approved statement of work. Hourly lines work for time-and-materials projects because the client needs hours, rates, and work descriptions. Milestone lines work for fixed-fee projects because the trigger is delivery or approval, not the number of hours worked.

Do client project invoices in the United States need a VAT or GST number?

United States client project invoices do not use a national VAT or GST registration number. Sellers that make taxable sales may need state-level sales-tax registration, such as a seller's permit or sales-tax account, depending on the state, nexus, product or service taxability, and place of sale.

Which mistake creates client project billing disputes?

Mixed billing bases create disputes. A client who approved project-level pricing will question an invoice grouped by individual worker, and a client who approved hourly work will question a flat milestone line without detail. Match invoice grouping to the contract, approved scope, and the client's approval process.

How does Everhour handle project, member, and task rates?

Everhour separates cost and billable rates, supports per-person defaults and per-project overrides, and can apply dated rate changes so older reports keep their original calculations. Billable projects can use project rates, member rates, or custom task rates depending on how the client project is priced.

How does Everhour turn client project time into invoices?

Everhour turns tracked billable time and expenses into invoices from uninvoiced work, calculates amounts from rates and billable expenses, and excludes non-billable work. Invoice line items can be grouped by project, task, person, date, or another available breakdown the client expects.

Keep project billing under control

Track approved project time, rates, and billable work before invoices are created. Everhour keeps client project billing connected to cost, rates, and invoice-ready records.

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