Why It Matters
Here's why it matters: the IRS allows up to $25,000 in rental losses to offset your W-2 salary — but only if your MAGI is $100,000 or below. That allowance shrinks dollar-for-dollar above $100K and disappears at $150K. Above that ceiling, your paper losses get suspended until you sell or qualify as a Real Estate Professional.
At a Glance
- What it is: AGI with certain deductions added back, used by the IRS to gate specific tax benefits
- Key threshold: $100,000 MAGI — where the $25,000 rental loss allowance starts to phase out
- Phase-out complete at: $150,000 MAGI — rental losses no longer offset ordinary income above this
- NIIT trigger: 3.8% surtax on investment income when MAGI exceeds $200,000 (single) or $250,000 (MFJ)
- Roth IRA phase-out: Starts at $146,000 (single) or $230,000 (MFJ) for 2024
- The calculation: AGI + passive losses + IRA deductions + student loan interest + other add-backs
MAGI (for $25K allowance) = AGI + Passive Losses + IRA Deductions + Other Add-backs
How It Works
AGI is your starting point. Adjusted Gross Income is your total income minus above-the-line deductions — 401(k) contributions, health insurance premiums, half of self-employment tax. You find it on line 11 of your Form 1040. MAGI starts there and adds certain items back, depending on which rule the IRS is applying.
The add-backs differ by rule. For the $25,000 rental loss allowance, MAGI equals AGI plus passive activity losses, IRA deductions, student loan interest, and a few other items. The IRS uses different MAGI definitions depending on which threshold it is gating — the NIIT calculation differs from the rental loss allowance version.
The $25,000 allowance and its phase-out. If your MAGI is at or below $100,000 and you actively participate in managing your rentals, you can deduct up to $25,000 in net rental losses against wages or other ordinary income. Above $100,000, you lose $1 of allowance for every $2 of additional MAGI. The full $25,000 is gone at $150,000. At $120,000 MAGI, for example, you can still deduct up to $15,000.
Suspended losses are not lost. When MAGI eliminates the allowance, the IRS suspends those losses. They carry forward and apply when your MAGI drops back into range, when you generate passive activity income to offset, or when you sell — at which point all suspended losses become deductible in full.
Active participation is a separate test. To claim the $25,000 allowance at all, you must "actively participate" in the rental activity — meaning you make management decisions like approving tenants, setting rents, or authorizing repairs. You do not need to manage day-to-day. This bar is lower than the Real Estate Professional test, which removes passive loss restrictions entirely.
Real-World Example
Lisa earns $130,000 as a marketing manager and owns two rentals. Last year, depreciation and repairs created a $14,000 net rental loss.
To find her MAGI, she starts with her AGI of $122,000 (after 401(k) and other deductions), then adds back her $3,000 IRA deduction. MAGI: $125,000.
At $125,000, she has exceeded the $100,000 floor by $25,000, reducing her allowance by $12,500. She can deduct $12,500 of the $14,000 loss against W-2 income. The remaining $1,500 suspends and carries forward.
If her income grows and MAGI hits $150,000 next year, the entire loss suspends until she sells or qualifies as a Real Estate Professional.
Pros & Cons
- Rental losses from depreciation and repairs can directly offset W-2 income for investors with MAGI below $150,000, reducing tax owed in the year the loss occurs
- Suspended losses do not expire — they carry forward and cut the tax bill when you sell or your income falls back into range
- The partial phase-out between $100,000 and $150,000 means you still capture some benefit rather than facing a hard cutoff
- Tracking MAGI before year-end lets you time IRA contributions to stay under the $100,000 threshold
- W-2 earners above $150,000 lose the deduction entirely unless they meet the demanding Real Estate Professional test
- The add-back calculation requires a CPA — the line items added back to AGI vary depending on which IRS rule applies
- Passive losses can accumulate for years without current-year benefit, blunting the cash-flow advantage of depreciation for higher earners
- MAGI thresholds are not inflation-indexed aggressively, so salary growth gradually erodes eligibility without any nominal rule change
Watch Out
- Your MAGI is not on your tax return. Form 1040 shows AGI on line 11 — not MAGI. You must compute it separately by adding back the items the IRS specifies for each rule. Treating them as identical leads to incorrect deduction claims.
- The phase-out is not all-or-nothing. Many investors assume they get the full $25,000 or nothing. The partial allowance between $100,000 and $150,000 is real — run the calculation before concluding you have lost it.
- Year-end income can push you over the threshold. A December bonus, stock vesting, or a property sale can tip your MAGI past $100,000 or $150,000 without warning. Estimating MAGI in Q3 gives you time to act.
- Active participation is required. If you invest through a fund or syndication where you have no management role, the $25,000 allowance does not apply regardless of your MAGI.
Ask an Investor
The Takeaway
MAGI is the number that determines whether your rental losses offset income this year or sit in suspension. Below $100,000 you get the full $25,000 allowance. Above $150,000 the door closes entirely, and the Real Estate Professional test becomes the only bypass. Compute it before year-end — that is the last point where you can still move it.