Can I require a signature on an invoice?

Yes. An invoice can include an eSignature field to acknowledge receipt, acceptance of terms, or approval for payment. For consumer-facing transactions, provide the ESIGN consumer disclosure when obtaining consent to electronic records.

How do I handle sales tax on invoices?

Charge sales tax only when the sale is taxable and you have nexus in the state. Register with the state tax authority when required and display tax registration numbers as necessary on invoices to support client and audit inquiries.

What happens if I entered the wrong amount?

Issue a credit note and corrected invoice referencing the original document. Keep both documents together in your records to maintain an auditable history for accounting and tax purposes.

Are e-signed invoices legally binding?

Yes. Electronic signatures are legally enforceable under the ESIGN Act (15 U.S.C. ch. 96) and state UETA laws, provided intent, consent, attribution, and record retention are demonstrable.

When do I need to collect a W-9?

Request a W-9 when a US payee is a vendor or contractor for whom you expect to file an information return such as Form 1099-NEC; keep the W-9 on file to avoid backup withholding.

How long should I keep invoice records?

Retain invoices at least three years to satisfy IRS record retention (IRC §6501(a)); keep healthcare billing with PHI for six years per HIPAA (45 CFR §164.530(j)), and consult state rules for longer periods.

Electronic Signature
Templates
Finance
Client Invoice Template

Client Invoice Template

This template is fully customizable. Edit the text, fill out the fields, and send it for signature. Give it a try!

CLIENT INVOICE

From

Company Name Contact Name Address Phone Email

Bill To

Client Name Contact Address Phone / Email

Invoice Number:

Invoice Date: Due Date:

Payment Terms: Currency:

Purchase Order / Reference:

Itemized Charges

Description	Quantity	Unit Rate	Amount

Subtotal

Tax ()

Shipping / Handling

Total Due

Payment Instructions

Accepted payment methods:

Bank Transfer Check Credit Card Wire

Detailed Payment Instructions

Terms & Conditions

Payment is due in accordance with the Payment Terms specified above. Any amount not paid within the stated terms is subject to a late fee and interest as provided below. Client is responsible for all applicable taxes, duties, and governmental charges unless otherwise stated.

Late Payment: Past due balances shall accrue interest at a rate of on the outstanding principal from the due date until paid in full. A grace period of days applies where agreed in writing.

Disputes: To dispute any charge, Client must notify the Issuer in writing within 10 days of the invoice date specifying the disputed amount and reasons. Failure to timely notify the Issuer shall constitute acceptance of the invoice by Client.

Collection Costs: If this invoice is referred for collection, Client agrees to pay reasonable collection costs, including attorneys' fees and court costs, in addition to outstanding principal, interest and fees.

Additional Terms / Notes

Certification

The undersigned certifies that the goods and/or services described herein were provided in accordance with the terms agreed between the Issuer and the Client, and that the amounts invoiced are true and correct to the best of the Issuer's knowledge.

Printed Name:

Signature:

Title:

Date:

What a Client Invoice Template Is and when to use it

A Client Invoice Template is a standardized billing document that records goods or services provided, itemizes charges, and sets payment terms. It creates a consistent record for accounts receivable, supports bookkeeping and tax reporting, and provides clear instructions for payment methods, due dates, and remittance details.

Why a clear invoice template matters for your cash flow

A well-structured Client Invoice Template reduces disputes, accelerates payment, and supports compliance with tax and recordkeeping rules. It establishes a consistent format for billing, simplifies monthly reconciliation, and creates a durable record for audits and client queries.

Who typically prepares and receives client invoices

Common users include small-business owners, accountants, project managers, and billing teams who issue or process invoices regularly.

Small-business owners who issue client invoices for services rendered and track payments.
Accounts receivable teams who manage collections, reconcile payments, and record revenue.
Freelancers and consultants who invoice by project or hourly work to maintain clear payment records.

Recipients are paying clients, accounting staff, and external auditors who rely on the invoice as evidence of transaction terms and payment history.

Essential parts of a professional Client Invoice Template

A complete invoice balances clarity and compliance: it must be easy to read for clients while capturing the information needed for accounting, tax reporting, and dispute resolution.

Invoice Number

A unique alphanumeric identifier for the invoice used to track payment and reconcile records across accounting systems and tax reports.

Issue Date

The date the invoice is issued in MM/DD/YYYY format; it establishes payment terms and may trigger late fee calculations or interest.

Due Date

A clear payment due date or net terms (for example, Net 30) so both parties understand when payment must be received to avoid penalties.

Line Items

Itemized goods or services with descriptions, quantities, unit prices, and line totals so clients can verify charges and tax authorities can audit transactions.

Tax Details

If applicable, show sales tax or VAT rates and amounts, the seller's tax registration number, and whether taxes are included or added to the subtotal.

Payment Instructions

Accepted payment methods, remittance address or bank details, and any reference code required to apply payments correctly on receipt.

Step-by-step: create and issue an invoice

Follow these core steps to produce a complete invoice, reduce errors, and speed payment processing.

01

Prepare details: Gather contract, PO, and hours or deliverables.
02

Populate template: Enter bill-to, line items, totals, and dates.
03

Add taxes: Calculate and display tax amounts clearly.
04

Send and log: Email or e-deliver and record the transmission date.

Customizing the template for automated workflows

Configure fields and routing to match your approval and accounting processes when using a digital platform or document automation.

Approval routing	Define approvers and sequential routing for sign-offs.
Auto-numbering	Enable sequential invoice numbering to prevent duplicates.
Conditional fields	Show tax fields only when applicable to the client.
PDF export settings	Set PDF/A or standard PDF as output for archives.
Notification rules	Trigger emails for issued, overdue, and paid statuses.

Digital delivery and eSignature considerations

Select delivery channels and authentication methods that match document sensitivity and client preferences.

File formats: PDF, DOCX, and XLSX supported
Authentication: Email link, SMS code, or stronger KBA
Integrations: CRM and accounting system links

Ensure your platform supports audit trails, secure storage (TLS/AES encryption), and the integrations you need; verify HIPAA, SOC 2, or industry compliance where required.

Where to send the invoice and expected routing

Invoices typically follow a simple sender-to-recipient route; verify the client's preferred remittance channel to speed processing.

Email delivery: Attach PDF and include payment instructions.
Customer portal: Upload invoice to client billing portal.
Accounting system: Record invoice in AR ledger for tracking.
Third-party payers: Send to payer or procurement contact as instructed.

Typical timelines and payment terms to include

Set explicit payment terms and calendar reminders to reduce late payments and support collections when necessary.

Net terms example:

Net 30, Net 45, or Net 60 depending on contract.

Due date clarity:

State exact due date, not just Net terms, to avoid confusion.

Late fees:

Specify interest or late fee calculation and start date.

Remittance window:

Indicate when payments are considered received.

Tax reporting:

Keep records for at least three years for IRS audits.

Common mistakes when preparing invoices

Missing or incorrect client TIN leads to backup withholding issues and delayed payments.
Vague line descriptions cause disputes and slow approvals from procurement teams.
Unclear payment instructions increase reconciliation errors and misapplied payments.
Duplicate invoice numbers or inconsistent numbering complicate accounting and audit trails.

Key risks if invoices are incorrect or incomplete

Backup Withholding: 24% withholding if TIN missing

Delayed Payment: Late fees and interest may apply

Client Dispute: Payment denial or chargeback risk

Tax Audit Exposure: Insufficient detail complicates IRS review

Recordkeeping Penalty: Failure to retain records raises compliance issues

Contract Breach: Incorrect invoices can trigger contractual remedies

Required invoice fields at a glance

Invoice Number: Unique identifier

Issue Date: MM/DD/YYYY format

Due Date: Payment deadline

Line Items: Qty, unit price, total

Tax Info: Rate and amount

Payment Details: Bank or remittance info

How to save, export, and bundle supporting documents

Export options and supporting attachments help with client disputes, tax filing, and archive retention.

PDF Export

Save invoices as PDF or PDF/A for long-term archives and consistent rendering across devices and accounting systems.

CSV/Excel

Export line-item data as CSV or XLSX for bulk imports into accounting software and reconciliation workflows.

Attachment Bundle

Attach contracts, purchase orders, or delivery receipts to provide substantiation for the billed items and reduce disputes.

Audit Log

Keep a transmission and signature audit trail to document delivery, changes, and approvals for compliance or dispute resolution.

Who is authorized to sign invoices

Jane Doe, CFO

A chief financial officer or designee typically has corporate authority to sign invoices that modify payment terms or settle disputes; document signature authority in internal policy to ensure enforceability.

Accounts Receivable Manager

Billing or accounts receivable managers usually issue and approve routine invoices and minor adjustments under delegated authority; maintain a written delegation to support audit and legal review.

How to update or revise an issued invoice

Follow an auditable reversal or crediting process to keep records clear and compliant when changes are needed.

01

Issue credit:

Create a credit note linked to the original invoice.

02

Revise invoice:

Generate a corrected invoice number and mark original as replaced.

03

Notify client:

Send corrected documents and explanation to payer.

04

Record adjustment:

Post adjustments in AR ledger with references.

05

Retain audit trail:

Keep originals and revised copies together.

06

Tax reporting:

Report adjustments on returns per IRS guidance.

Notarization and witness steps when authentication is required

Most invoices do not require notarization; when authentication is needed for special settlements, follow a clear notary workflow.

01

Prepare documents

Gather original invoice, ID, and required exhibits before scheduling notarization.

02

Select notary

Choose an in-person or RON notary meeting legal criteria in your state.

03

Signer ID

Signer must present government-issued ID or complete remote identity proofing.

04

Notary act

Notary completes acknowledgment or jurat and signs the certificate.

05

Audio-video record

For RON, retain audio-video record per state rules if required.

06

Attach certificate

Attach notarial certificate to the invoice or settlement document.

07

Log entry

Notary records the act in journal per state law.

08

Store copy

Retain notarized copy with audit trail and access controls.

eSignature pricing and feature comparison for invoice workflows

Compare basic pricing and common features across vendors; signNow is listed first per platform comparison standards.

	signNow	DocuSign	Adobe Sign	PandaDoc	HelloSign
Starting Price	$8/user/mo	$15/user/mo	$14/user/mo	$19/user/mo	$15/user/mo
Free Trial	7-day free trial	No	No	Yes, limited	Yes, limited
Bulk Send	Yes	Yes	Yes	Yes	No
Audit Trail	Yes	Yes	Yes	Yes	Yes
HIPAA Compliant	Yes	Yes	Yes	No	No

Frequently asked questions about using a Client Invoice Template

Answers to common questions about fields, eSignature, taxes, corrections, and record retention for invoices.

Need help? Contact support

Can I require a signature on an invoice?
Yes. An invoice can include an eSignature field to acknowledge receipt, acceptance of terms, or approval for payment. For consumer-facing transactions, provide the ESIGN consumer disclosure when obtaining consent to electronic records.
How do I handle sales tax on invoices?
Charge sales tax only when the sale is taxable and you have nexus in the state. Register with the state tax authority when required and display tax registration numbers as necessary on invoices to support client and audit inquiries.
What happens if I entered the wrong amount?
Issue a credit note and corrected invoice referencing the original document. Keep both documents together in your records to maintain an auditable history for accounting and tax purposes.
Are e-signed invoices legally binding?
Yes. Electronic signatures are legally enforceable under the ESIGN Act (15 U.S.C. ch. 96) and state UETA laws, provided intent, consent, attribution, and record retention are demonstrable.
When do I need to collect a W-9?
Request a W-9 when a US payee is a vendor or contractor for whom you expect to file an information return such as Form 1099-NEC; keep the W-9 on file to avoid backup withholding.
How long should I keep invoice records?
Retain invoices at least three years to satisfy IRS record retention (IRC §6501(a)); keep healthcare billing with PHI for six years per HIPAA (45 CFR §164.530(j)), and consult state rules for longer periods.

be ready to get more

Join over 28 million airSlate SignNow users

Sign Now