Business expense guide

Phone and Internet for Self-Employed Work

Use this guide to organize potentially relevant costs while keeping personal use, eligibility, reimbursement, and timing limitations visible.

Last reviewed: July 14, 2026

What this category generally includes

supported business use of communications and connectivity services may qualify when the facts establish an appropriate business connection and current requirements are met.

Potentially relevant business expenses

  • a separate business phone line
  • additional line charges
  • supported business use of internet service
  • business communications applications

These are organizational examples, not a determination that a particular cost is deductible.

Personal-use and mixed-use considerations

Personal calls, streaming, household internet use, and shared devices require a reasonable documented business-use method. A reasonable allocation needs records that explain the chosen business percentage.

Reimbursement considerations

Client or employer reimbursements and bundled service credits should be separated from remaining out-of-pocket cost. Spending and reimbursement should not be used to claim the same economic cost twice.

Recordkeeping suggestions

Keep monthly bills, line details, service agreements, business-use calculations, calendars or logs supporting methodology, and reimbursement records.

Expenses requiring special treatment

Device purchases are different from service charges and may require equipment, capitalization, or depreciation review.

Capitalization and depreciation warning

Long-lived property, improvements, acquired intangible rights, prepaid costs, and other capital items may not receive the same current treatment as routine operating costs. This guide does not calculate depreciation, amortization, basis, or an expensing election.

Eligibility limitations

Eligibility depends on the complete facts, applicable tax year, entity, business purpose, personal use, reimbursement, timing, and current instructions. The site cannot determine legal deductibility.

Hypothetical example

Hypothetical example: A tutor documents a reasonable business share of a combined internet plan. The example illustrates record organization and does not promise eligibility or tax savings.

Common mistakes

  • Assuming every payment in this category qualifies without reviewing its business purpose.
  • Claiming a personal, reimbursed, or mixed-use amount in full.
  • Keeping only a bank description instead of supporting purpose and treatment.
  • Assuming a $1,000 expense normally creates a $1,000 refund; a deduction generally reduces an income measure rather than reimbursing the purchase price.

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Official sources and annual review

Review IRS Self-Employed Individuals Tax Center, Schedule C instructions, and IRS Publication 505, Schedule C instructions. Tax-year values and forms require annual review; this site is not endorsed by the IRS.

Planning scope

Results and examples are planning estimates and hypothetical illustrations. 1099TaxCalcs.com does not prepare or file tax returns and does not replace IRS, SSA, state, or local instructions. Tax rules can change, state and local taxes or specialized rules may be excluded, and eligibility depends on individual facts. Verify current official sources and consider a qualified professional when the decision is material or complex.

Tax disclaimer

This educational page does not determine eligibility or provide individualized tax, legal, accounting, or financial advice. Verify current official instructions and your facts before filing or paying.