Key money is a nonrefundable lump sum a prospective tenant pays a landlord to secure a commercial lease, separate from the security deposit and first month’s rent. The IRS treats it as ordinary rental income for the landlord in the year it’s received, and as a capital cost for the tenant that must be amortized over the lease term rather than deducted all at once. Getting the classification wrong on either side can trigger a 20% accuracy-related penalty on the resulting underpayment.
How Key Money Differs from Other Upfront Payments
Key money compensates the landlord for the location’s desirability, existing customer goodwill, or simply the privilege of signing the lease in a competitive market. Once paid, it’s gone. Nothing about later events, including a broken lease, brings it back.
A security deposit is a different animal. It’s held against potential damage or missed rent and must be returned at the end of the lease minus legitimate deductions. Many states cap deposits at one or two months’ rent.
Prepaid rent covers a specific future month’s obligation early. It moves the timing of a payment but doesn’t create a new cost. Key money isn’t credited against any month; it’s a standalone fee for the right to enter the lease.
Key money is also not a broker’s commission. Brokerage fees go to a licensed intermediary. Key money flows directly from tenant to landlord.
Is Key Money Legal
The answer turns on whether the lease is commercial or residential. In commercial real estate, key money is a widely accepted cost of doing business as long as both parties document the payment in the lease. Regulators focus on transparency and disclosure rather than banning the practice.
Residential leases work differently. Many jurisdictions with rent-stabilization or rent-control laws treat key money as an illegal end-run around deposit caps or regulated rents. Cities that limit what a landlord can charge upfront often prohibit any nonrefundable payment beyond defined categories like rent and utility deposits. Landlords who demand key money in those markets risk penalties and may have to refund it.
Relabeling doesn’t help. When key money is restricted, some landlords call it a “fixture purchase” or “lease assignment fee.” Courts routinely look past the label to the payment’s actual function.
How Landlords Are Taxed
The IRS treats key money the same way it treats advance rent: as ordinary rental income, reportable in full in the year of receipt, regardless of the period the lease covers or the landlord’s accounting method.1Internal Revenue Service. Publication 527 – Residential Rental Property A ten- or twenty-year lease term does not spread the income. It all hits year one.
The same rule applies to payments a tenant makes to cancel or modify a lease; the IRS considers those rent as well, taxable in the year received.1Internal Revenue Service. Publication 527 – Residential Rental Property A large key money payment can create a real spike in taxable income, which matters for estimated payments and bracket planning.
Report the amount alongside other rental income. Any amount received for the use or occupation of property counts as rental income.2Internal Revenue Service. Tips on Rental Real Estate Income, Deductions and Recordkeeping
Cash Payments Over $10,000
A landlord who receives key money in cash faces an extra step. Any business that takes more than $10,000 in cash in a single transaction, or in related transactions, must file Form 8300 within 15 days of the payment.3Internal Revenue Service. Form 8300 and Reporting Cash Payments of Over $10,000 The form requires the payer’s taxpayer identification number. Wire transfers don’t count as cash for this rule. Actual currency does, and so do cashier’s checks and money orders under $10,000.
How Tenants Deduct Key Money
Tenants cannot write off key money as a lump-sum business expense. The IRS classifies fees, bonuses, and other amounts paid to acquire a lease as capital costs that must be amortized across the lease term, spreading the deduction evenly year by year.
The amortization period isn’t always the initial lease term alone. Under the Treasury regulations implementing Section 178, if less than 75% of your lease acquisition cost is attributable to the remaining initial term, you must include renewal option periods in the amortization calculation.4eCFR. 26 CFR 1.178-1 – Depreciation or Amortization of Improvements on Leased Property In practice, a large key money payment relative to the remaining term can force you to stretch the deduction over renewal options you hold.
There is an exception. If you can show it’s more likely than not that you won’t renew, you can amortize over just the remaining initial term. That’s a factual determination, and the IRS can challenge it.4eCFR. 26 CFR 1.178-1 – Depreciation or Amortization of Improvements on Leased Property
Tenants report the annual amortization on Form 4562, identifying the intangible, the acquisition date, and the amortization period. Keep the lease and any allocation documentation on hand; those are the records the IRS will ask for in an audit.
When Part of the Payment Is for Goodwill
In restaurant and retail deals, part of the key money often covers the prior tenant’s customer base or the location’s established reputation. That looks like it might fall under Section 197, which amortizes goodwill and similar intangibles over a fixed 15-year period. But Section 197 explicitly excludes interests under existing leases of tangible property from its covered intangibles.5Office of the Law Revision Counsel. 26 USC 197 – Amortization of Goodwill and Certain Other Intangibles So a payment purely for the leasehold amortizes under the lease-term rules of Section 178. A slice that genuinely represents purchased goodwill from a business acquisition follows the 15-year Section 197 schedule. The lease documentation has to allocate the payment clearly between the two.
When the Lease Ends Early
If the lease terminates before the tenant has finished amortizing the key money, any unamortized balance can generally be deducted as a loss in the year of termination. Once the leasehold interest no longer exists, the unrecovered cost becomes deductible.
Documenting Key Money in the Lease
The lease agreement is where the tax treatment for both parties is set. The contract should state:
- The exact nonrefundable sum, confirmed as separate from any security deposit or rent.
- What the payment covers, whether that’s the leasehold interest, existing business goodwill, the right to acquire trade fixtures, or a mix.
- A specific dollar allocation for each component when the payment covers more than one. This allocation controls whether amortization follows the lease term or the 15-year Section 197 schedule.
Ambiguity is where trouble starts. When the lease doesn’t specify what key money covers, the IRS defaults to the characterization that produces the most immediate tax revenue: full ordinary income for the landlord, and for the tenant, either a longer amortization period or a fight over whether the deduction stands at all.
Penalties for Getting It Wrong
Both sides face real consequences. The IRS imposes an accuracy-related penalty of 20% on any underpayment caused by negligence or a substantial understatement of income tax. For individuals, a substantial understatement means the shortfall exceeds the greater of 10% of the tax that should have been shown on the return, or $5,000.6Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty A landlord who fails to report a $50,000 key money payment as income owes the tax on it, a 20% penalty on top, and interest that runs until the balance is paid.