MOBIX LABS, INC (MOBX) Post-Termination ISO Calculator
Calculator · free · no signup · MOBXLeft MOBIX LABS, INC with vested ISOs? Most plans give you 90 days to exercise or forfeit. See your deadline, the AMT cost of exercising, and the share count that maximizes after-tax value.
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Your grant
Tax inputs
Schedule A, line 7. The 2026 deduction is capped at $40,400, less above $505,000 of income.
Grant timeline
Recommended exercise quantity
Exercise all 10,000
With 10%/yr expected growth over the 3-yr hold, every share's expected after-tax gain exceeds its marginal AMT cost. Net value: $166,790 at horizon.
Net after-tax value vs. shares exercised
Each point is the expected after-tax NPV at your hold horizon if you exercise that many shares now and let the rest expire.
Year-by-year tax breakdown
You pay the higher of Regular tax and Tentative AMT per jurisdiction, then subtract Credit recovered. The result is Net tax. Hover any number for the bracket-by-bracket breakdown.
| 1 | 10,000 | |||
| 2 | 0 | |||
| 3 | 0 |
Federal AMT credit
Earned
$139,162
Recovered
$21,392
Remaining
$117,770
The AMT credit only recovers in years where regular tax exceeds AMT — typically a year with no ISO exercise. It carries forward indefinitely (Form 8801) and applies in any future tax year where regular tax exceeds AMT.
Estimates only. Excludes disqualifying dispositions, NSOs, multi-state moves, and AMT preferences other than ISO bargain elements. Long-term capital gains tax assumes a qualifying disposition (ISO held ≥1 yr from exercise and ≥2 yr from grant); state LTCG follows ordinary brackets except where the state grants preferential treatment (HI, ND, SC, WI, AR, NM) or has a dedicated LTCG-only tax (WA). Assumes you are within the $100K ISO limit (any portion of an annual ISO grant whose FMV at grant exceeds $100K is treated as NSO from the start, §422(d)). State AMT figures are 2025 (next-year values published in late 2026). Not financial advice.
QSBS note. If your shares qualify (typically pre-IPO C-corp grants held 5+ years), a federal rule lets you exclude up to $10M of gain on a future sale from federal tax. That single rule shifts exercise-timing math more than AMT does. (This is §1202 “qualified small-business stock”.) Modeled in beta, not here.
You solved the exercise window. The beta plans what comes after it: the new shares, your remaining equity, hedges, and taxes in one multi-year plan.
Request beta access →Related calculators: Multi-Year ISO Exercise Schedule Calculator · Stock Concentration Calculator
About MOBIX LABS, INC
MOBIX LABS, INC (MOBX) is a public Semiconductor company, incorporated in Delaware and headquartered in Irvine, CA. IPO'd Jan 2, 2024.
Last close: $0.92 per share (as of 2026-10-09).
Nasdaq; RF/connectivity semiconductors.
Equity grants at MOBIX LABS, INC typically include incentive stock options (ISOs) and non-qualified stock options (NSOs).
Fabian Battaglia co-founded Mobix Labs in Irvine, California, on July 31, 2020, to build radio frequency (RF, the signal bands wireless devices use to communicate) semiconductor components. The company designs custom RF integrated circuits, millimeter-wave communication and imaging systems, and electromagnetic interference (EMI) filtering connectors for defense, aerospace, industrial and medical customers. On December 21, 2023, Mobix Labs completed a merger with special-purpose acquisition company Chavant Capital Acquisition Corp., converting the shell company into Mobix Labs, Inc. and beginning trading on Nasdaq under the ticker MOBX the following day.
Sources: sec.gov · sec.gov · investors.mobixlabs.com · globenewswire.com
Equity comp at MOBIX LABS, INC
- RSUs held by executives and directors accelerate fully upon a change of control (single-trigger, meaning no termination of employment is required as a second condition for vesting to accelerate). Significant RSU grants to officers, directors, and key employees were made outside of the 2023 Equity Incentive Plan and required separate shareholder approval via proxy vote. Equity awards use a deferred-tranche structure rather than a standard cliff-and-graded schedule, with each tranche carrying its own one-year vesting period from its grant date. A 2023 Employee Stock Purchase Plan was adopted allowing eligible employees to purchase shares at a discount, but no offering period had launched as of early 2024.
- Vesting schedule: Non-standard deferred-tranche structure: executive and director RSUs are issued in three separate tranches, granted on the 1st, 2nd, and 3rd anniversaries of the December 2023 SPAC merger closing, with each tranche vesting one year after its grant date. Pre-closing RSUs for certain key employees vest one-third per year over three years from the merger closing. The 2023 Equity Incentive Plan delegates vesting terms to the board on an award-by-award basis with no single standard schedule..
Sources: sec.gov · sec.gov · sec.gov · sec.gov · sec.gov
Researched 2026-07-11.
OptionsAhoy is an independent tool and is not affiliated with, endorsed by, or sponsored by MOBIX LABS, INC.
If you have left MOBIX LABS, INC (MOBX) with vested incentive stock options (ISOs), most stock plans give you 90 days from your departure date to exercise or forfeit them. Exercising everything at once concentrates the AMT bargain element into a single tax year. This calculator computes your window deadline from your departure date, the alternative minimum tax (AMT) cost of a full exercise at the current trading price, and the partial-exercise share count that maximizes expected after-tax value.
All MOBIX LABS, INC tools → · Use the generic Post-Termination ISO Exercise Calculator for any company.
MOBIX LABS, INC equity questions
- I left MOBIX LABS, INC. How long do I have to exercise my ISOs?
- Most stock plans give you 90 days from your departure date to exercise vested incentive stock options (ISOs); unexercised options are forfeited when the window closes. Tax law is slightly wider: ISO treatment requires you to have been an employee within 3 months of exercise (Internal Revenue Code Section 422(a)(2)), so options exercised under an employer-extended window are taxed as non-qualified stock options (NSOs). Check your grant agreement for MOBIX LABS, INC's exact terms. The calculator above computes your deadline from your departure date, the alternative minimum tax (AMT) cost of exercising, and the share count that maximizes after-tax value.
- Does MOBIX LABS, INC grant ISOs, NSOs, or RSUs?
- Equity compensation at MOBIX LABS, INC typically takes the form of incentive stock options (ISOs) and non-qualified stock options (NSOs). Incentive stock options can trigger the alternative minimum tax (AMT) when you exercise.
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