Are HOA Reserve Funds Taxable? Form 1120-H and the Three Tests

HOA reserve funds are partly taxable and partly not, and the split matters. The assessment dollars homeowners pay into reserves are not taxable to the association when it files Form 1120-H under Section 528 of the Internal Revenue Code, because those dollars count as “exempt function income.” The interest, dividends, and other investment earnings the reserves produce are taxable, at a flat 30% on Form 1120-H or 21% on a standard corporate Form 1120.¹ Getting the two buckets confused is what puts boards on the wrong side of an IRS notice.

Why Assessment Dollars in Reserves Are Not Taxed

Money collected from owners as regular dues, fees, and assessments — including special assessments earmarked for a roof replacement or road repaving — is classified as exempt function income under Section 528. It’s excluded from taxable income on Form 1120-H.¹ What matters is the source, not the destination. If the money comes from property owners as part of their membership obligation, it qualifies, whether the board spends it that year or parks it in reserves for a future project.

The practical effect is significant. An association that collects $500,000 in annual assessments and deposits $200,000 of that into reserves owes no federal income tax on any of the $500,000, provided the Section 528 tests below are met. The reserve balance is treated as member contributions held for shared property, not as association profit.

Most homeowners associations are taxable entities at the federal level even when they’re organized as nonprofits under state law. Section 501(c)(3) charitable status doesn’t fit a typical neighborhood association, and the narrow 501(c)(4) social-welfare path requires common areas open to the general public and a community resembling a governmental area — conditions few subdivisions satisfy.² For everyone else, Section 528 is the mechanism that keeps assessments out of the tax base.

What Is Taxable: Interest and Investment Earnings on the Reserves

This is where reserve funds do generate a tax bill. Exempt function income covers only what owners pay in dues, fees, and assessments. Everything else the association earns falls outside that definition and is fully taxable.¹ For a reserve fund, that typically means:

Interest on savings accounts and certificates of deposit
Dividends from invested reserves
Capital gains on bonds or money market funds

The reserve principal may consist entirely of tax-free assessments, but the moment that money earns a dollar of interest, that dollar is taxable. The IRS treats the earnings as a separate income stream from the contributions that produced them.

On Form 1120-H, the association can deduct expenses directly connected to producing that non-exempt income, along with state and local taxes (other than sales taxes tied to property transactions or taxes that increase property value) and professional fees for managing the investment portfolio. Federal income taxes themselves are never deductible. After those deductions, Section 528 allows a flat $100 specific deduction against what remains.³¹

The Three Tests Your Association Must Pass

Filing Form 1120-H is not automatic. The association has to meet three tests every year to claim the Section 528 election, and failing any one of them pushes the association onto a standard corporate return.

The 60% Income Test

At least 60% of gross income for the year must come from exempt function sources — dues, fees, and assessments from members.⁴ An association that draws heavy revenue from renting the clubhouse to outsiders, leasing rooftop space for cell towers, or charging nonresidents for pool access can fail this test.

The 90% Expenditure Test

At least 90% of expenditures for the year must go toward acquiring, building, managing, or maintaining association property.⁵ A trap sits inside this rule: transferring money into a reserve account doesn’t count as an expenditure. Only actual spending qualifies. An association that collects heavily for reserves but spends little during the year can fail this test if non-qualifying costs, such as lobbying or member entertainment, use up more than 10% of its actual outlays.

The 85% Residential Use Test

At least 85% of the association’s units or lots must be used for residential purposes.⁶ For condominiums, the measure is square footage; for subdivisions, the count is residential lots. Amenity spaces such as pools, tennis courts, and parking count as residential. Commercial retail space does not. Mixed-use developments with significant storefronts are the ones most at risk.

Form 1120-H or Form 1120: Which Rate Applies to Reserve Earnings

The Section 528 election is made fresh each year. Your association can file Form 1120-H one year and a standard Form 1120 the next without asking IRS permission, because the election applies only to the year filed.³ Revoking the election for a year already filed, however, requires IRS consent.⁷

The choice changes the rate on reserve investment income:

Form 1120-H (Section 528 election). Non-exempt income is taxed at a flat 30%. The filing is simpler, and assessments are automatically excluded. No net operating loss carryforward is allowed.¹
Form 1120 (standard corporate return). All net income is taxed at the 21% corporate rate. The lower rate can save real money when investment income is substantial, but the return is more complex, expenses have to be allocated between exempt and non-exempt activities in more detail, and assessments do not receive the same blanket exclusion.

For most small associations earning modest interest on reserves, Form 1120-H is the practical choice: the 30% rate only hits the non-exempt slice, and the simpler filing saves accounting cost. Associations with large investment portfolios or meaningful rental revenue are the ones that benefit from running the numbers both ways each year, because a 9-percentage-point difference on a five-figure investment income line adds up.

Excess Assessments and the Rev. Rul. 70-604 Vote

A related tax problem shows up when the association collects more in assessments than it spends. Without action, the IRS can treat that surplus as taxable income. Revenue Ruling 70-604 lets the association avoid that result: if members vote to apply the excess to the following year’s assessments or to refund it, the surplus is not taxable income for the current year.⁸

The member vote is the point of the rule. A board resolution alone isn’t enough. The homeowner-members have to decide, at a meeting, whether to refund or roll forward. Many associations put this vote on the annual meeting agenda as a standing item, and it should be a standing item, because skipping it in a year with an unexpectedly large surplus lets the IRS tax the overage. Excess assessments rolled into the following year become exempt function income in that next year; the ruling simply matches the income to the year it’s applied.

Recordkeeping That Protects the Treatment

Two habits keep a reserve fund’s tax picture clean. First, maintain records showing which assessment dollars fund operating expenses and which fund reserves, backed by formal budget documents and board resolutions tying reserve deposits to specific future projects such as elevator replacement or pool resurfacing. Those records strengthen the association’s position if the IRS ever questions the allocation. Second, monitor the income mix through the year rather than at year-end. If clubhouse rentals, cell-tower leases, or nonresident amenity fees start creeping up against dues income, the 60% test can fail before anyone at the board table notices.

Boards that hand tax filing to a management company should still confirm the return was actually filed. “I thought someone else handled it” is a common explanation, and the IRS doesn’t accept it.

1
Office of the Law Revision Counsel. 26 USC 528 – Certain Homeowners Associations
2
Internal Revenue Service. IRC Section 501(c)(4) Homeowners Associations
3
Internal Revenue Service. Instructions for Form 1120-H
4
eCFR. 26 CFR 1.528-5 – Source of Income Test
5
eCFR. 26 CFR 1.528-6 – Expenditure Test
6
eCFR. 26 CFR 1.528-4 – Substantiality Test
7
eCFR. 26 CFR 1.528-8 – Election to Be Treated as a Homeowners Association
8
Internal Revenue Service. Information Letter – Guidance Regarding Revenue Ruling 70-604