Is an electronic signature legally valid?

Yes. Electronic signatures meet legal equivalence under the ESIGN Act (15 U.S.C. §7001) and state UETA laws when intent, consent, attribution, and record retention requirements are satisfied.

Do I need a notarization for the letter?

Not always. Some lenders or insurers request notarization or a notary-attested affidavit; state notary rules vary and many states permit remote online notarization (RON) under state law.

What supporting documents should I attach?

Include receipts, invoices, mileage logs, contracts, photos, and any maintenance or purchase records. Cross-reference exhibits to the letter so reviewers can reconcile figures easily.

How should I demonstrate the business-use percentage?

Provide the calculation method, sample calculations, and supporting logs or spreadsheets. Use consistent rounding and attach original log exports or GPS reports where available.

Who may sign on behalf of a company?

An authorized officer or agent should sign and state their title. If an agent signs, attach evidence of delegation of authority or a corporate resolution if requested by the recipient.

Can this letter be provided to the IRS electronically?

Yes; supply it on request as part of an audit or substantiation package. Maintain records per IRS retention rules (see IRC §6501(a)) and be prepared to produce originals or verifiable electronic copies.

Business Use Letter

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BUSINESS USE LETTER

This Business Use Letter (the "Agreement") is made and entered into as of the Effective Date: by and between Licensor Name: , and Licensee Name: .

PARTIES AND CONTACTS

Licensor Address Licensee Address Primary Contact for Licensor Primary Contact for Licensee

RECITALS

WHEREAS, Licensor is the lawful owner or authorized manager of the premises located at (the "Premises"); and

WHEREAS, Licensee desires permission to use the Premises for the business purpose described below and Licensor is willing to grant such permission on the terms set forth in this Agreement; and

WHEREAS, the parties intend this document to create binding obligations regarding permitted use, payment, confidentiality, and related matters.

SCOPE OF WORK / AUTHORIZED BUSINESS USE

Licensee is authorized to use the Premises solely for the following business purpose(s) and activities. Any material deviation from the described use requires prior written consent of Licensor.

PAYMENT TERMS

Licensee shall pay Licensor for the business use of the Premises as follows:

Payment Amount (per agreed period) Payment Schedule Late Payment Fee

All payments are due in lawful currency and are exclusive of taxes, assessments or utilities unless otherwise stated. Late payments shall accrue interest at the rate specified above and Licensor may suspend Licensee's access to the Premises for nonpayment after providing written notice and a cure period of days.

TERM AND TERMINATION

This Agreement begins on Start Date: and continues until End Date: unless earlier terminated in accordance with this section.

Either party may terminate this Agreement without cause by providing written notice to the other party at least days prior to the intended termination date. Licensor may terminate immediately for cause, including material breach, unsafe use of the Premises, illegal activity, or nonpayment, subject to any cure periods expressly required by this Agreement.

CONFIDENTIALITY

Each party acknowledges that in the course of performance it may receive Confidential Information of the other party. "Confidential Information" means non-public information disclosed in writing or orally that is designated as confidential or reasonably understood to be confidential. Each party shall: (a) use Confidential Information solely for the purposes of performing under this Agreement; (b) restrict disclosure to those employees, agents or contractors with a need to know; and (c) take commercially reasonable steps to protect such Confidential Information. Confidential Information does not include information that is or becomes publicly available through no fault of the receiving party, is lawfully obtained from a third party, or is independently developed.

INDEMNITY AND LIABILITY

Licensee shall indemnify, defend and hold harmless Licensor and its affiliates from and against claims, losses, liabilities, damages and expenses (including reasonable attorneys' fees) arising out of Licensee's use of the Premises, except to the extent caused by Licensor's gross negligence or willful misconduct. Except as to indemnity for gross negligence or willful misconduct, neither party shall be liable to the other for consequential, incidental, or punitive damages.

COMPLIANCE WITH LAW; INSURANCE

Licensee shall comply with all applicable laws, codes, permits and regulations relating to its use of the Premises. Licensee shall maintain commercial general liability insurance in amounts customary for the business use described and shall provide proof of insurance upon Licensor's request.

NOTICES

All notices under this Agreement shall be in writing and delivered by hand, certified mail (return receipt requested), or reputable overnight courier to the addresses set forth below or to any other address provided in writing by a party.

Notices to Licensor Notices to Licensee

GOVERNING LAW; DISPUTE RESOLUTION

This Agreement shall be governed by and construed in accordance with the laws of the State of , without regard to its conflicts of law principles. The parties agree to attempt good faith negotiations to resolve disputes. If unresolved within thirty (30) days, disputes shall be submitted to binding arbitration in the county where the Premises are located, governed by the applicable arbitration statute.

ENTIRE AGREEMENT; AMENDMENT

This Agreement constitutes the entire understanding between the parties with respect to the subject matter hereof and supersedes all prior negotiations, representations, or agreements, whether written or oral. This Agreement may be amended only by a written instrument signed by both parties.

MISCELLANEOUS

If any provision of this Agreement is held invalid or unenforceable, the remaining provisions will continue in full force and effect. The parties are independent and nothing herein creates an agency, partnership or joint venture except as otherwise expressly set forth.

Licensor

Printed Name:

By:

Date:

Licensee

Printed Name:

By:

Date:

What a Business Use Letter Is

A Business Use Letter is a written statement documenting that a specific asset, service, or expense is used primarily for business purposes rather than personal use. Commonly requested by tax authorities, lenders, insurers, and employers, the letter identifies the asset, describes the business activity, states the percentage or portion of business use, sets effective dates, and certifies accuracy under penalty of perjury when required. The document supports deductions, reimbursements, insurance claims, and compliance reviews and can be notarized or electronically signed depending on recipient requirements.

Why the Business Use Letter Matters

A clear Business Use Letter provides evidence for tax deductions, reimbursement claims, and insurance coverage. It reduces disputes by documenting intent, dates, and use percentage, helping satisfy IRS substantiation rules and lender or insurer requirements while supporting audit defense.

Who Typically Prepares and Receives This Letter

Organizations and individuals prepare Business Use Letters to document eligibility for deductions, reimbursements, insurance claims, and compliance reviews.

Small businesses documenting vehicle or equipment business mileage and cost allocation.
Employees seeking reimbursement for mixed-use assets such as phones, laptops, or vehicles.
Accountants and tax preparers substantiating deductions for IRS examinations or lender reviews.

Use the letter alongside receipts, mileage logs, and contracts to create a complete record that withstands scrutiny.

Core Elements to Include in a Professional Letter

A professional Business Use Letter includes standardized headings, clear identification of parties and assets, quantified use details, supporting evidence, and authorized signatures to meet tax, insurance, and lender requirements.

Heading

Include document title, date, and contact information for preparer and recipient. Use official business letterhead if available to provide provenance and facilitate correspondence during audits or claims.

Parties

Identify the business entity and any individual signer, including legal business name, DBA if applicable, employer identification number or SSN redacted where appropriate, and physical address to match records.

Asset

Provide a detailed description of the asset: make, model, year, vehicle VIN or equipment serial number, or service agreement reference so third parties can unequivocally identify the item in question.

Use Details

State business purpose, time period covered, and calculation method for business use percentage or mileage with precise start and end dates to support tax and reimbursement claims.

Evidence

Attach or reference supporting documentation such as invoices, maintenance records, mileage logs, contracts, or photos; cross-reference exhibit labels to the letter for clear audit trails.

Authentication

Include signature block, printed name, title, date, and, if required by recipient, notarization or eSignature certificate and signer authentication details to prove attribution and intent.

Step-by-Step: Preparing and Delivering the Letter

Follow these steps to prepare, validate, and deliver a Business Use Letter that meets common recipient requirements.

01

Identify Asset: Specify the asset and its identifying details (make, model, serial number).
02

Document Use: State business purpose, dates, mileage or percentage of use.
03

Attach Evidence: Include receipts, mileage logs, contracts, and insurance declarations.
04

Sign & Date: Signer prints name, signs, dates, and notes title or authority.

How to Configure an Online Business Use Letter Workflow

Configure your online Business Use Letter workflow to collect fields, enforce required inputs, and capture signer authentication and attachments.

Field	Configuration
Required Fields	Mark name, asset, use, dates, signature required.
Validation Rules	Use format checks for dates, TIN, and percentages.
Attachments	Require receipts, logs, or contracts as file uploads.
Authentication	Set email, SMS OTP, or stronger methods per recipient.

Choosing Delivery and Authentication Methods

Choose a delivery channel that preserves authenticity and audit trails while meeting recipient requirements and retention.

Email Delivery: Acceptable for many recipients; ensure delivery confirmation.
Certified Mail: Physical proof of mailing and receipt.
eSignature Platform: Provides audit trail, authentication, and secure storage.

Where to Send a Business Use Letter

Decide where recipients require the Business Use Letter and choose a delivery method that meets their authentication and recordkeeping rules.

IRS or Tax: Provide on request with supporting receipts or mileage logs.
Lender: Include for loan underwriting or collateral documentation as requested.
Insurance: Submit to claims adjuster with policy number and proof of loss.
Employer: Attach to expense reports for reimbursement and payroll records.

Typical Timelines and Response Expectations

Timelines depend on purpose: supply the letter promptly when requested to avoid delayed claims, audit issues, or loan closings.

IRS Requests:

Provide on request; retain supporting records for at least 3 years.

Insurance Claims:

Submit within insurer's claims window, often 30–90 days.

Employer Reimbursement:

Follow company expense policy; typical submission within 60 days.

Loan Underwriting:

Provide during due diligence to avoid closing delays.

Audit Response:

Supply promptly when IRS or auditors request documentation.

Common Mistakes to Avoid

Incomplete descriptions that omit serial numbers, dates, or mileage make it difficult for auditors to corroborate business use and may lead to disallowed deductions.
Using informal language or vague percentages like 'mostly business' without supporting logs or calculations reduces evidentiary value during audits or insurer reviews.
Failing to sign, date, or indicate signer's authority can render the letter noncompliant for lenders or insurers requiring corporate authorization.
Submitting unsigned scanned copies or screenshots without an audit trail prevents reliable attribution and can be rejected in electronic submission workflows.

Penalties and Risks from Incorrect or Misleading Letters

Disallowed Deductions: May increase tax liability and interest.

IRS Penalties: Incorrect returns can trigger IRC §6721 information return penalties.

Backup Withholding: Missing or incorrect TIN can trigger 24% withholding.

Insurance Denial: Insurer may deny claims without documentation.

Contractual Breach: False statements could breach loan covenants.

Criminal Liability: Knowingly false statements can carry criminal penalties.

Practical Tips for an Accurate, Audit-Ready Letter

Follow consistent formatting and evidence standards to strengthen the Business Use Letter's reliability for tax, insurance, and lender recipients.

Keep a contemporaneous mileage log

Record trips in real time with date, purpose, start and end odometer readings or GPS miles to substantiate mileage percentages. Avoid reconstructing logs retroactively, which reduces credibility during audits and insurer reviews.

Use corporate letterhead and contact info

Print the letter on official company letterhead and include a preparer contact, business address, and phone. Letterhead establishes provenance and helps recipients validate that the statement originates from an authorized corporate source.

Quantify use with clear methodology

Explain how percentages were calculated, including formulas or sample calculations. Attach supporting spreadsheets or logs and note rounding rules so reviewers can reconcile figures to receipts and schedules.

Preserve originals and signed copies

Keep signed originals or secure electronic copies with immutable audit trails. Maintain copies in multiple secure locations and ensure retention timelines meet IRS, HIPAA, or state-specific requirements.

Real-World Examples of Business Use Letters

These examples show how Business Use Letters support tax deductions, lender underwriting, and insurance claims across real scenarios.

Small Business Mileage

A local consulting firm prepared a Business Use Letter to support vehicle mileage deductions claimed on its corporate tax return.

Used monthly mileage logs and GPS reports.
The letter combined signed certification with attached spreadsheet summaries and archived GPS export files, enabling the firm's accountant to substantiate the deduction during routine tax preparation and to respond quickly to any IRS inquiries.

Insurance Claim Support

A contractor submitted a Business Use Letter after equipment theft to establish business ownership and usage for the insurer.

Included serial numbers and purchase invoices.
With the signed letter, invoices, and photographs, the insurer processed the claim faster and accepted the business use assertion without a site visit, reducing downtime for ongoing projects.

eSignature Pricing and Feature Snapshot for Business Use Letters

Compare basic plan features and limits to choose an eSignature option for executing Business Use Letters and related documentation.

	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 trial	Varies	Varies	Varies	Varies
Bulk Send	Yes	Varies	Varies	Varies	Varies
Audit Trail	Yes	Yes	Yes	Yes	Yes
HIPAA Compliant	Yes	Yes	Yes	No	No

Common Questions About Execution, Validity, and Submission

Frequently asked questions address execution, evidentiary strength, notarization, eSignature legality, and common submission issues for Business Use Letters.

Need help? Contact support

Is an electronic signature legally valid?
Yes. Electronic signatures meet legal equivalence under the ESIGN Act (15 U.S.C. §7001) and state UETA laws when intent, consent, attribution, and record retention requirements are satisfied.
Do I need a notarization for the letter?
Not always. Some lenders or insurers request notarization or a notary-attested affidavit; state notary rules vary and many states permit remote online notarization (RON) under state law.
What supporting documents should I attach?
Include receipts, invoices, mileage logs, contracts, photos, and any maintenance or purchase records. Cross-reference exhibits to the letter so reviewers can reconcile figures easily.
How should I demonstrate the business-use percentage?
Provide the calculation method, sample calculations, and supporting logs or spreadsheets. Use consistent rounding and attach original log exports or GPS reports where available.
Who may sign on behalf of a company?
An authorized officer or agent should sign and state their title. If an agent signs, attach evidence of delegation of authority or a corporate resolution if requested by the recipient.
Can this letter be provided to the IRS electronically?
Yes; supply it on request as part of an audit or substantiation package. Maintain records per IRS retention rules (see IRC §6501(a)) and be prepared to produce originals or verifiable electronic copies.

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