Accountable Plan for S-Corp Owners: Tax-Free Expense Reimbursement

By Yarik Yarosh, CPA ·September 5, 2026 ·4 min read

Written by Yarik Yarosh, CPA (US & Canada) September 5, 2026 · FL CPA license AC61704 · CPA Ontario

Under the TCJA (2018-2025, now extended by OBBBA), employees cannot deduct unreimbursed business expenses. For S-Corp owner-employees, this means expenses paid personally (home office, vehicle, phone, internet) are not deductible on the personal return. The solution is an accountable plan: a formal arrangement under which the S-Corp reimburses the owner-employee for business expenses. The reimbursement is tax-free to the employee (not included in W-2 income), not subject to FICA or payroll taxes, and fully deductible by the S-Corp. Without an accountable plan, the same expenses produce zero tax benefit.

✓Key takeaway

Accountable plan requirements (all three must be met):

Business connection: the expense must have a business connection (it would have been deductible as a business expense if the employee were self-employed)
Adequate accounting: the employee must substantiate the expense to the employer within a reasonable time (typically 60 days of the expense)
Return of excess: any reimbursement exceeding the substantiated expense must be returned within a reasonable time (typically 120 days)

If all three requirements are met: the reimbursement is excluded from the employee’s W-2 income (not reported in Box 1, not subject to FICA).

Common expenses reimbursed through an accountable plan:

Home office:

Simplified method: $5/sq ft, up to 300 sq ft = $1,500/year
Actual method: pro-rata share of rent/mortgage interest, utilities, insurance, repairs, depreciation
The S-Corp reimburses the owner for the home office used for business
No W-2 income, no FICA, full deduction for the S-Corp

Vehicle (mileage reimbursement):

Reimburse at the IRS standard mileage rate (70 cents/mile for 2025)
15,000 business miles x $0.70 = $10,500 tax-free reimbursement
The owner tracks mileage (app or log) and submits to the S-Corp
The S-Corp pays $10,500 to the owner, deducts it as an expense
The owner receives $10,500 tax-free (not on the W-2)

Phone and internet:

Business-use percentage of the monthly bill
Typically 60-80% business use for a sole-owner S-Corp
$150/month phone x 70% = $105/month = $1,260/year

Travel and meals:

Airfare, hotel, car rental for business travel: 100% reimbursed
Meals during business travel: 50% deductible by the S-Corp (the reimbursement to the owner is still tax-free; the S-Corp’s deduction is limited to 50%)

Tax savings from the accountable plan:

Without accountable plan (owner pays expenses personally):

Home office, vehicle, phone: $0 deduction (TCJA suspended employee business expense deduction)

With accountable plan:

Home office reimbursement: $1,500
Vehicle reimbursement: $10,500
Phone reimbursement: $1,260
Total reimbursement: $13,260
Tax-free to owner, deductible by S-Corp
Annual tax savings: approximately $3,100-$5,200 depending on bracket

How does an accountable plan work in practice?

Hypothetical example

Round numbers. An S-Corp owner-employee. W-2 salary: $60,000. The owner uses a home office, drives for business, and pays for phone and internet.

Expenses eligible for reimbursement:

Home office (200 sq ft x $5 simplified): $1,000
Vehicle (12,000 business miles x $0.70): $8,400
Phone ($100/month x 75% business): $900
Internet ($80/month x 50% business): $480
Professional conferences (2 per year): $2,000
Books and subscriptions: $300
Total: $13,080

Without accountable plan:

Owner pays all $13,080 out of pocket
No deduction (TCJA disallows employee business expenses)
Owner’s W-2: $60,000
FICA on $60,000: $9,180 (employer + employee)
Income tax on $60,000 + K-1: bracket-dependent
Expenses: $13,080 out of pocket, no tax benefit

With accountable plan:

S-Corp reimburses owner $13,080 (tax-free, not on W-2)
S-Corp deducts $13,080 (reduces net income, reduces K-1 by $13,080)
K-1 tax savings at 24%: $13,080 x 24% = $3,139
Plus: QBI effect. Lower K-1 means lower QBI deduction ($13,080 x 20% x 24% = $628 lost QBI savings)
Net annual tax savings: $3,139 - $628 = $2,511

Setting up the plan:

Draft a written accountable plan document (1-2 pages)
Adopt by board resolution (owner signs as sole director)
Owner submits expense reports with receipts monthly or quarterly
S-Corp reimburses via separate check or transfer (not through payroll)
Bookkeeper records as business expense (not wages)
Reimbursements do NOT appear on W-2

Cost to set up: $0-$500. Annual maintenance: 15 minutes/month of expense reporting. The plan pays for itself in tax savings within the first year.

Important: the accountable plan must be a real plan, not a paper exercise. The IRS looks for:

Written plan document on file
Actual expense reports submitted by the employee
Receipts or documentation for each expense
Reimbursement payments traceable in the S-Corp’s bank records
Excess returned within the required timeframe

A sole-owner S-Corp where the owner writes themselves a check labeled “expense reimbursement” with no documentation is a nonaccountable plan (taxable as wages). The formality matters.

Illustrative numbers only, not a real client and not advice for your facts.

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Cite this page

Yarik Yarosh, CPA. "Accountable Plan for S-Corp Owners: Tax-Free Expense Reimbursement." Blue Cloud CPA, September 5, 2026. https://bluecloudcpa.com/guides/small-business-scorp-accountable-plan-setup

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.