Over-Income Tenant Procedures Under LIHTC Rules

The Low-Income Housing Tax Credit program has produced more than 3.65 million affordable rental units since 1987, making it the largest source of affordable housing construction in the country. But the compliance work doesn't end when a tenant moves in. Income can rise well past program limits during the years that follow, and when it does, a specific federal procedure, not eviction, not immediate rent hikes, governs what happens next.

The program's basic trade works like this: developers sell ten years of federal tax credits to equity investors who fund construction, and in exchange, owners commit to income-restricted occupancy for a minimum compliance period. IRC §42 sets that floor at 15 years, with an extended-use period tacking on another 15, and many state-level governing plans push the total obligation to 30 years. Eligibility gets checked hard at move-in. What's less understood, even among people who work in compliance, is that the obligation doesn't freeze there. It runs continuously, year over year, for the life of the compliance period. Income moves. The program has rules for what to do when it moves too far.

The three minimum set-aside elections and how the one chosen at the start determines everything that follows

Every LIHTC property starts with a decision that can never be undone: the minimum set-aside election. Owners choose it at the time of application, and federal law gives them three options.

The 20-50 test requires that at least 20% of a project's units be rent-restricted and occupied by households at or below 50% of area median income. The 40-60 test, the most common choice for mixed-income developments, requires 40% of units to be restricted and occupied at or below 60% of AMI. Then there's the Average Income Test, added under the Consolidated Appropriations Act of 2018, which lets owners qualify units across a spread of income bands, so long as at least 40% of units are designated at income levels averaging 60% of AMI or less. Under AIT, individual units can be set at 20%, 30%, 40%, 50%, 60%, 70%, or 80% of AMI, and the option only applies to properties placed in service after 2018.

This decision matters far beyond initial eligibility screening. It sets the ceiling against which every future over-income determination gets measured. A 20-50 project and a 40-60 project apply the same statutory logic to two entirely different income lines. And AIT complicates things further: because each unit under AIT carries its own income designation, the over-income threshold isn't a single project-wide number. It has to be calculated unit by unit, tied to whatever designation that specific unit was assigned at initial qualification.

The definition of "over-income" under IRC §42 and the calculation of the 140% threshold

Under IRC §42, a low-income unit becomes over-income when the aggregate income of its occupants rises above 140% of the applicable income limitation described in §42(g)(1)(A) and (B). Deep rent-skewed projects, the category defined under IRC §142(d)(4)(B), get a more generous cushion: 170% instead of 140%.

How that 140% gets calculated depends entirely on the set-aside election made at the outset. A 20-50 project doesn't treat a tenant as over-income until income clears 140% of the 50% AMI limit. A 40-60 project uses 140% of the 60% AMI limit instead, a materially higher ceiling. Under AIT, the calculation gets more granular still: the threshold is 140% (or 170% for deep rent-skewed projects) of whichever is greater, 60% of AMI or the specific imputed income limitation assigned to that unit.

None of this is a trigger for eviction. Crossing 140% doesn't strip a tenant of their right to occupy the unit, and it doesn't obligate the owner to remove them. What it triggers instead is a set of procedural obligations on the owner's side, the Next Available Unit Rule chief among them, discussed further down.

Annual recertification as the mechanism that detects over-income status

Over-income status doesn't get discovered by accident. It surfaces through the annual recertification process, which requires owners to verify each tenant's income, assets, and household composition every year to confirm the household still qualifies. The effective date for that recertification should line up with the anniversary month of the tenant's initial certification, the point at which the household was first qualified for the unit.

The math itself is mechanical, three steps, no ambiguity. First, pull the current HUD-published income limit for the applicable AMI level. Second, multiply that figure by 140%. Third, compare the household's gross annual income against that product. If income exceeds it, the Next Available Unit Rule kicks in, and the owner has to act.

Buildings where 100% of units are designated low-income can receive a waiver from the annual recertification requirement, and federal rules only require income recertification for the first two years after initial occupancy in these all-credit buildings. The Next Available Unit Rule mostly doesn't apply here either, for a straightforward reason: every unit in the building has to go to a qualified household anyway, so there's no "market-rate" pool competing for the space.

The Next Available Unit Rule: what the owner must do once a tenant is identified as over-income

The Next Available Unit Rule (NAUR) comes from IRC §42(g)(2)(D), with the mechanics laid out in implementing federal regulations. The core idea: an over-income unit keeps its low-income status, and the owner keeps the associated credits, as long as every comparable unit in the building that's currently available, or that becomes available afterward, gets leased to an income-qualified household.

This is a broader obligation than it sounds like at first read. It doesn't stop at "the next unit that opens up." It covers every comparable unit in the building, on an ongoing basis, until sufficient qualified low-income units are in place to support the building's credit allocation. That can mean multiple units, over an extended stretch of time, all needing to go to qualified tenants before the over-income unit's status is considered protected.

"Comparable" gets measured one of two ways: either floor space or bedroom count. The comparability determination must be applied consistently; owners are expected to use the same method throughout the NAUR obligation.

The treatment of rent for an over-income tenant while the NAUR is in effect

LIHTC rent limits are capped at 30% of the AMI figure tied to the owner's set-aside election, full stop, regardless of what any one household brings home, since they were never built around what an individual tenant earns. They're capped at 30% of the AMI figure tied to the owner's set-aside election, full stop, regardless of what any one household brings home. That structural fact is what protects over-income tenants from an immediate rent shock.

While the NAUR obligation is being satisfied, an over-income tenant keeps paying the same rent-restricted amount they always have. Their income crossing 140% doesn't, by itself, authorize the owner to move them to market rate. There's one clear exception: at properties that include market-rate units, a tenant whose income clears the 140% line can have their unit redesignated as market-rate, and only at that point can the owner raise the rent accordingly.

Industry practice has built around this with a standard lease addendum. Tenants are typically notified, in writing, that if household income later exceeds 140% of the applicable limit, management may, upon proper notice, adjust rent to the market rate that applies to the unit's redesignated status. It's a disclosure mechanism, not an automatic rent increase, and the distinction matters for compliance review.

Documentation requirements that must accompany every step of the NAUR process

Every NAUR determination needs a paper trail in two places at once: the over-income tenant's file and the file of whatever tenant fills the next available comparable unit. Compliance reviewers look for both, and a gap in either file is a problem.

The over-income tenant's file should show the recertification that identified the income breach, with the calculation against the current 140% limit clearly documented. It should also include a written record of when the over-income determination was made, plus any lease addendum or notice given to the tenant about potential future rent treatment.

The replacement tenant's file carries its own burden. It needs a full income certification proving the new tenant is qualified, and documentation tying that specific tenancy back to the NAUR obligation created by the original over-income unit. Reviewers want to see the causal link on paper: this unit was rented to satisfy that unit's NAUR requirement.

Complications multiply when two or more units go over-income at the same time. In that situation, the owner has to track and satisfy each unit's NAUR obligation separately, and every decision along the way needs to be documented. It's a place for a file that can withstand a state housing agency's review months or years later, not a place for informal judgment calls. It's a place for a file that can withstand a state housing agency's review months or years later.

The consequences of violating the NAUR: credit disallowance, recapture, and the Form 8823 process

The consequences of getting this wrong are severe, and they compound. If an owner leases the next available comparable unit to a tenant who isn't income-qualified, the affected units in the building can lose their low-income status, a penalty that can spread beyond the single mishandled unit. It's a consequence that ripples across the building's unit mix.

At the project level, that loss of status almost always means the building can no longer meet its minimum set-aside commitment, which is the trigger for disallowance of current-year credits and recapture of credits already claimed in prior years. This isn't a discretionary outcome. It follows from how the applicable fraction works: that fraction gets evaluated on December 31 of every year in the compliance period, and any decrease in it reduces the building's qualified basis. Qualified basis is the number the credit calculation runs on, so a reduction there flows straight through to a reduction in allowable credit.

The paperwork consequence runs through a designated noncompliance reporting form that state agencies use to flag violations to the federal tax authority. A NAUR failure found alongside a lapse in annual recertification reflects a common underlying gap in file management that state agencies take seriously.

Tenant protections and unresolved policy questions that compliance staff should be aware of

The protection at the center of all this is simple to state and easy to lose sight of in the compliance weeds: no LIHTC tenant has to leave their home because their income went up. The NAUR exists specifically to let that tenant stay, while still letting the owner protect the credits the building depends on. It's a rule built to serve both interests at once, and on paper, it does.

What the statute doesn't do is answer a harder question directly: does over-income status count as good cause for eviction? Federal LIHTC rules don't say one way or the other. Housing advocates have argued that over-income status alone should not constitute good cause to evict, on the reasoning that the tenant hasn't done anything wrong and the owner isn't harmed as long as the NAUR is being satisfied correctly. That gap in federal guidance leaves room for inconsistent treatment across states and, potentially, for tenants to face eviction risk that the underlying statute never actually intended to create.

Compliance staff sit at the center of that ambiguity. Getting the recertification calculation right, tracking the NAUR obligation unit by unit, and building a documentation trail that can survive a Form 8823 review are the parts of the job that are settled. What still isn't settled is how far a tenant's protection extends once their income crosses that line, and that's a policy question the industry hasn't fully closed.