Maryland and DC Stock Options Tax: Two Jurisdictions, Two Very Different Problems

The DC metro area is one of the densest concentrations of equity-compensated professionals in the country — Lockheed Martin and Marriott in Bethesda, Ciena and Emergent BioSolutions in the Maryland suburbs, and defense-tech and cybersecurity companies concentrated throughout the Beltway corridor. Many workers live in Maryland but commute to Virginia employers (Amazon HQ2, Booz Allen Hamilton, Capital One), and DC proper has its own dense tech and government-contractor workforce.

Maryland and DC have adopted dramatically different approaches to stock option taxation in 2026, creating two distinct sets of planning challenges:

• Maryland: new 2% capital gains surtax (H.B. 350, effective TY2025) creates a counterintuitive outcome where high earners (AGI > $350,000) pay more state tax on qualifying ISO dispositions than on ordinary income. No state AMT. QSBS conforms via rolling IRC.
• DC: decoupled from the OBBBA-expanded §1202 QSBS exclusion (emergency legislation B26-0457, late 2025) — federally excluded startup gains owe DC up to 10.75%. No state AMT. ISO follows federal.

Maryland Income Tax: Graduated Brackets Plus New High-Income Rates

Maryland's income tax starts from federal AGI and applies its own graduated brackets.¹ For 2026, the FY2026 Budget Reconciliation and Financing Act (H.B. 352, signed 2025) added two new high-income brackets to Maryland's existing eight-bracket structure:²

Maryland also imposes a county income tax on residents, collected by the Comptroller alongside state income tax. County rates in the major tech and defense-contractor suburbs range from 3.2% (Montgomery, Howard, Baltimore County, and Baltimore City) to 2.25% in lower-rate counties. The combined top state + county rate for a Montgomery County resident with income over $1M is 9.7% on ordinary income — before the capital gains surtax.

Maryland's Capital Gains Surtax: The Counterintuitive 2026 Trap

H.B. 350 (part of the FY2026 Budget Reconciliation Act, signed 2025) imposed a permanent 2% surtax on net capital gains for Maryland taxpayers with federal AGI exceeding $350,000.³ The surtax applies to capital gains recognized in the year — not to ordinary income components of the same return.

For stock option planning, this creates an unusual result: in Maryland, if your AGI exceeds $350,000, your qualifying ISO disposition gains are taxed at a higher combined state+county rate than ordinary income from NQSO exercises or disqualifying dispositions.

The CG surtax applies to net capital gains. Exemptions include gain from sale of a principal residence under $1.5 million, retirement plan distributions, and IRC §179 property. Stock option gains from NQSO exercises (as ordinary income) are not capital gains and therefore not subject to the surtax. Capital gains from ISO qualifying dispositions and from post-exercise appreciation on NQSO-acquired shares are subject to the surtax for taxpayers with federal AGI > $350,000.³

ISO Treatment in Maryland: No State Tax at Exercise

Maryland individual income tax is computed starting from federal AGI.¹ ISO exercises do not create federal AGI — the spread is an AMT preference item under IRC §56(b)(3) only. Because Maryland starts from federal AGI, the ISO exercise spread is not included in Maryland taxable income in the exercise year. Maryland imposes no tax at ISO exercise. The Maryland tax event is deferred entirely until you sell the shares — at which point the gain is a capital gain, subject to Maryland's regular rates plus, if applicable, the 2% CG surtax.

Maryland has no state alternative minimum tax.⁵ The only AMT exposure from ISO exercises is federal (Form 6251). This is a meaningful benefit relative to California (7% state AMT) and Minnesota (6.75% state AMT). A Maryland employee at Ciena or Emergent BioSolutions exercising ISOs in an exercise-and-hold strategy faces only federal AMT — no additional Maryland AMT layer.

NQSO Treatment in Maryland

NQSO exercise spreads are W-2 ordinary income at the federal level, and Maryland follows federal income character: the spread is Maryland ordinary income taxed at the applicable Maryland bracket rate. For most Beltway tech employees with W-2 income above $250,000, the marginal Maryland rate on an NQSO exercise will be 5.75%–6.5% state, plus county tax of 2.25%–3.2%.

QSBS in Maryland: Rolling Conformity Including OBBBA

Maryland conforms to IRC §1202 (Qualified Small Business Stock) via rolling IRC conformity under Md. Code Ann., Tax-Gen. § 10-203.⁴ This means Maryland adopts federal §1202 changes as they occur — including the OBBBA enhancements signed July 4, 2025:

• Gross asset limit at issuance: $75M (up from $50M), for QSBS acquired after July 4, 2025
• Per-issuer exclusion cap: $15M per taxpayer (up from $10M)
• Tiered exclusion: 50% at 3-year hold; 75% at 4-year hold; 100% at 5-year hold

A Maryland resident who early-exercises options at a qualifying startup (under $75M gross assets), files an 83(b) election within 30 days of exercise, and holds for 5+ years can exclude up to $15M of gain from both federal and Maryland income tax. Unlike California and Oregon, Maryland does not decouple from §1202 — the federal exclusion flows through to the Maryland return. At 5.75%, a $15M QSBS gain exclusion saves $862,500 in Maryland state tax alone (plus county savings of up to $480,000 in a 3.2% county).

Washington DC: Higher Rates and the QSBS Decoupling Trap

Washington DC imposes its own income tax on residents using a progressive rate structure separate from Maryland, Virginia, and federal income tax. DC uses the same federal AGI starting point as Maryland, so ISO exercises generate no DC income at exercise (no state AMT, no ordinary income at exercise) — the DC tax clock starts when you sell the shares.

DC income tax brackets 2026

DC taxes long-term and short-term capital gains at the same ordinary income rates — there is no DC LTCG preference. A $500K NQSO spread is taxed at 9.25% (partially) and 9.75% (partially) in DC — significantly higher than Maryland's 5.75%–6.25% at the same income level. DC has no separate city income tax (DC is a unified jurisdiction with no county layer), but its rates are among the highest in the region.

The DC QSBS Decoupling: Critical Warning for Startup Employees

The VA–MD–DC Commuter Triangle: Reciprocity and Its Limits

The DC metro area has one of the largest daily-commuter populations in the country. Virginia maintains income tax reciprocity agreements with Maryland and DC: a Maryland resident who works in Virginia pays Maryland income tax on wages, not Virginia tax; a DC resident who works in Virginia pays DC income tax on wages, not Virginia tax.⁸

However, wage reciprocity has documented limitations for equity compensation:

• NQSO exercises (W-2 income): The spread is W-2 income. For a Maryland resident who works at Amazon HQ2 or Booz Allen in Virginia, the W-2 NQSO spread may be subject to Maryland tax under the MD–VA reciprocity framework — not Virginia tax — though the application to deferred equity compensation rather than current wages has nuances that vary by state.
• ISO qualifying-disposition gains (capital gains): Reciprocity agreements cover wages and salaries from employment. Capital gains from share sales are investment income, not wages — reciprocity agreements generally do not shield them. A Maryland resident who exercised ISOs from Virginia employment and now sells shares at a qualifying disposition likely owes Maryland income tax on the full gain (as a Maryland resident with Maryland-source capital gains) plus potentially a Virginia nonresident sourcing claim on the fraction attributable to Virginia workdays during the grant-to-exercise period.
• DC–Maryland commuters: DC residents who work in Maryland (and Maryland residents who work in DC) have their own reciprocity framework. The application to equity compensation is similarly nuanced.

The cross-state equity compensation picture in the MD–VA–DC triangle is among the most complex sourcing situations in the country. Large NQSO or ISO gains from employment spanning multiple jurisdictions warrant a specialist review before exercising.

Nonresident Sourcing: Former Maryland and DC Residents Still Owe

If you received stock option grants while working in Maryland or DC and have since relocated to a no-tax or lower-tax state, those jurisdictions may still assert a sourcing claim when you exercise. Maryland uses the standard workdays-ratio approach:¹⁰

MD-source income = exercise spread × (Maryland workdays from grant to exercise ÷ total workdays from grant to exercise)

DC similarly sources income from equity grants earned during DC employment using a workdays-ratio approach for nonresidents who later exercise after leaving DC. If you worked in DC, received grants, and moved to Virginia, Texas, or another state, DC may still assert a sourcing claim on the DC-workdays fraction of any NQSO spread or ISO qualifying-disposition gain attributable to the DC employment period.

State Tax Comparison: Maryland and DC vs. the Region

Six Planning Strategies for Maryland and DC Stock Option Holders

1. Model the CG surtax in every qualifying-disposition analysis

Maryland residents with AGI consistently above $350,000 — typical for senior Beltway tech and defense-contractor employees with significant option grants — should include the 2% CG surtax in every qualifying-vs-disqualifying disposition model. The surtax is not enormous, but it's enough to shift the break-even in edge cases where the ISO spread is large, post-exercise appreciation is modest, and the marginal federal bracket differential between ordinary and LTCG rates is below the historical 17-point gap. Use the ISO Exercise AMT Calculator for the federal side and layer on the Maryland CG surtax as a separate line in the comparison.

2. No state AMT in Maryland or DC — ISO exercise-and-hold strategy unchanged

Neither Maryland nor DC has a state alternative minimum tax on ISO exercises. This means the exercise-and-hold approach to ISO exercises is not penalized at the state level in either jurisdiction — unlike California, Minnesota, and Colorado, which layer their own AMT on top of the federal AMT. For Maryland and DC employees, the ISO exercise analysis reduces to: (a) federal AMT modeling, (b) qualifying-disposition holding period timing, and (c) for Maryland high earners, the CG surtax on the eventual qualifying-disposition sale. The state component is not a barrier to exercising and holding in Maryland or DC.

3. QSBS: Strongly prefer Maryland residency over DC for startup equity

If you hold pre-IPO stock options at a qualifying startup and are deciding where to live in the DC metro area before a liquidity event, Maryland's §1202 conformity vs. DC's decoupling is a material financial difference. A $10M QSBS qualifying gain (100% excluded federally under OBBBA 5-year tiered rate): Maryland = $0 state tax; DC = up to $1,075,000 in DC income tax. For founders and early startup employees in the DC metro area, the residency decision before exercising and selling QSBS is one of the highest-leverage planning choices available.

4. Use the QSBS 83(b) strategy at Maryland startups to start the exclusion clock

Maryland's §1202 conformity extends to the 83(b) election holding-clock benefit. Early-exercising options at a qualifying Maryland startup (under $75M gross assets), filing Form 15620 within 30 days, and holding 5 years starts the §1202 exclusion clock at exercise — not at vesting. Combined federal + Maryland exclusion on up to $15M of qualifying gain equals zero tax at both levels. Maryland startups in the biotech corridor (Rockville, Gaithersburg), cybersecurity (Columbia, Annapolis Junction), and SaaS sectors are eligible QSBS issuers if they meet the §1202 requirements.

5. Virginia vs. Maryland residency for options earned in Virginia

Many Beltway employees live in Maryland but hold options from Virginia employers (Amazon HQ2, Capital One, Booz Allen, CACI). The state that ultimately taxes the option income depends on (a) residency at exercise/sale, (b) how the VA–MD reciprocity agreement characterizes the income, and (c) nonresident sourcing rules for capital gains. At a high level: for NQSO ordinary income, Maryland residents with options from Virginia employment may owe Maryland tax (not Virginia) under the reciprocity framework. For ISO qualifying-disposition gains, Maryland taxes the gain as a Maryland-resident capital gain (plus potentially a Virginia nonresident claim on the Virginia-workday fraction). The combined MD state+county rate of 8.95% is higher than Virginia's 5.75% — employees holding Virginia-issued options who have a choice of state residency should model the difference, particularly on large grants.

6. Former Maryland and DC residents: calculate your sourcing exposure before exercising

If you received option grants while working in Maryland or DC and have since moved to Florida, Texas, or another no-tax state, the sourcing ratio determines how much Maryland or DC can still claim on your exercise spread. The ratio erodes over time — each post-relocation month reduces the Maryland or DC share of the grant-to-exercise period. If you moved two years ago and hold options granted three years ago, roughly 40% of your grant-to-exercise period may already be post-departure. Whether waiting to exercise meaningfully reduces exposure depends on grant dates, the spread, and the stock's outlook. Model the sourcing ratio before any large exercise event if you relocated from MD or DC.

1. Maryland individual income tax — federal AGI starting point and ISO treatment. Maryland individual income tax is computed starting from federal adjusted gross income (AGI) with Maryland-specific additions and subtractions under Md. Code Ann., Tax-Gen. § 10-205. ISO exercises generate an AMT preference item under IRC §56(b)(3) but do not create federal AGI; therefore Maryland does not recognize ordinary income when ISOs are exercised. Maryland tax is deferred until shares are sold, at which point the gain is a capital gain taxed at Maryland ordinary income rates (no separate LTCG preference at the state level). This treatment is consistent with the majority of states that start from federal AGI. Sources: Maryland Comptroller — Individual Income Tax Instructions; Md. Code Ann., Tax-Gen. § 10-205; Maryland Comptroller: Tax Information for Individual Income Tax.
2. Maryland income tax brackets and county income tax rates for 2026. Maryland uses a graduated state income tax structure from 2% to 5.75% (existing eight brackets) with two new high-income brackets added for TY2026 under the FY2026 Budget Reconciliation and Financing Act (H.B. 352): 6.25% on income $500,001–$1,000,000 (single; $600,001–$1,200,000 MFJ) and 6.5% on income over $1,000,000 (single; over $1,200,000 MFJ). All Maryland residents also pay a local (county) income tax, which is collected by the state Comptroller; rates range from 2.25% to 3.3% depending on county of residence. Major tech-corridor counties — Montgomery, Howard, Baltimore County, and Baltimore City — are each at 3.2% for 2026. Sources: Maryland Comptroller: Withholding Tax Facts 2026; Citrin Cooperman: Sweeping Maryland Tax Changes Enacted in FY 2026 Budget Bill; Maryland DLS County Tax Rate Schedule 2026.
3. Maryland 2% capital gains surtax (H.B. 350, H.B. 352, FY2026 Budget Reconciliation and Financing Act). Maryland enacted a permanent 2% surtax on net capital gains for individuals with federal adjusted gross income (AGI) exceeding $350,000, effective for tax years beginning after December 31, 2024. The surtax applies to net capital gains as recognized on the Maryland return. Exemptions include: gain from the sale of a primary residence under $1.5 million, deferred compensation plan distributions, livestock, and property qualifying under IRC §179. Capital gains from stock option qualifying dispositions and post-exercise appreciation on NQSO-acquired shares are subject to the surtax for taxpayers with federal AGI above the threshold. Ordinary income components (NQSO exercise spreads recognized as W-2 income, ISO disqualifying-disposition bargain elements recognized as ordinary income) are not capital gains and are not subject to the surtax. Sources: Bishop & Adkins: New Capital Gains Surcharge (Effective July 1, 2025); CohnReznick: Maryland Legislature Passes Budget with Significant Tax Implications; Maryland H.B. 350 / H.B. 352 (2025 Session).
4. Maryland §1202 QSBS conformity. Maryland conforms to IRC §1202 (Qualified Small Business Stock) at the individual level via rolling IRC conformity under Md. Code Ann., Tax-Gen. § 10-203. Rolling conformity means Maryland automatically adopts federal §1202 changes as enacted, including the OBBBA enhancements effective July 4, 2025 ($75M gross asset limit, $15M per-taxpayer exclusion cap, tiered 50/75/100% exclusions at 3/4/5-year hold). Federally excluded §1202 QSBS gain flows through to Maryland as an exclusion, reducing Maryland taxable income to zero on the excluded portion. Sources: QSBS Expert: Maryland Qualified Small Business Stock; Keystone Global Partners: 2026 QSBS by State; Md. Code Ann., Tax-Gen. § 10-203.
5. Neither Maryland nor DC has a state alternative minimum tax applicable to ISO exercises. Maryland's individual income tax is computed under Md. Code Ann., Tax-Gen. §§ 10-101 through 10-830; there is no Maryland state AMT provision. DC's income tax similarly has no state AMT. ISO exercise spreads that create federal AMT liability (as AMT preference items under IRC §56(b)(3)) do not generate additional Maryland or DC state tax in the exercise year. States with their own state AMT include California (7%), Minnesota (6.75%), Colorado (3.47%), and Iowa. Source: Maryland Comptroller Individual Income Tax Instructions; DC Office of Tax and Revenue, Individual Income Tax Instructions; state AMT survey in Tax Foundation: 2026 State Income Tax Rates.
6. Washington DC income tax brackets 2026. DC uses a seven-bracket progressive income tax structure: 4% on the first $10,000; 6% on $10,001–$40,000; 6.5% on $40,001–$60,000; 8.5% on $60,001–$250,000; 9.25% on $250,001–$500,000; 9.75% on $500,001–$1,000,000; and 10.75% on income over $1,000,000. DC taxes long-term and short-term capital gains as ordinary income at these rates — no separate LTCG preference. Sources: Nova Tax Services: Washington DC Individual Income Tax 2026; DC Office of Tax and Revenue Individual Income Tax Information.
7. DC decoupled from OBBBA §1202 QSBS expanded exclusion. Washington DC enacted emergency legislation (B26-0457, 2025) decoupling from expanded OBBBA §1202 QSBS provisions. Under DC's decoupling, federally excluded §1202 QSBS gains are included in DC taxable income and taxed at DC's regular rates (up to 10.75%). DC residents who sell QSBS stock with federal exclusion under §1202 must include the excluded gain in DC income and pay DC tax. This is analogous to California's and Oregon's QSBS decoupling but at DC rates of up to 10.75%. DC's decoupling makes it a materially unfavorable jurisdiction for startup founders and early employees relative to Maryland and Virginia. Source: The Startup Law Blog: 2026 QSBS State-by-State Conformity Guide; emergency legislation B26-0457.
8. Virginia–Maryland–DC income tax reciprocity. Virginia maintains income tax reciprocity agreements with Maryland, the District of Columbia, West Virginia, Kentucky, and Pennsylvania. Under these agreements, Maryland residents who earn wages from Virginia employment pay Maryland income tax (not Virginia), and Virginia residents who earn wages from Maryland employment pay Virginia income tax (not Maryland). DC–Virginia and DC–Maryland reciprocity similarly apply to wages. The reciprocity agreements are designed for W-2 wages and salaries; their application to equity compensation events (NQSO exercise spreads, ISO qualifying-disposition gains, QSBS gains) is more complex and may not be fully covered by reciprocity language. Sources: Virginia Department of Taxation — Residency Status guidance; Maryland Comptroller — Nonresident Tax; DC Office of Tax and Revenue.
9. 2026 Social Security wage base: $184,500. NQSO exercise spreads are FICA wages subject to 6.2% SS tax (employee share) up to the annual wage base, plus 1.45% Medicare tax on all FICA wages, plus 0.9% Additional Medicare Tax on wages over $200,000 (single filer). Source: Social Security Administration — Contribution and Benefit Base 2026.
10. Maryland nonresident sourcing of stock option income. Maryland sources income from stock options granted during Maryland employment using a workdays-ratio allocation for nonresidents filing Form 505 (Maryland Nonresident Income Tax Return). The allocation ratio is Maryland workdays during the grant-to-exercise period divided by total workdays during the same period. Former Maryland residents who have relocated to no-tax or lower-tax states must file a Maryland nonresident return and pay Maryland tax on the Maryland-sourced fraction of NQSO exercise spreads and qualifying-disposition gains attributable to Maryland employment periods. DC similarly sources option income to the DC-workday fraction for nonresidents. Source: Maryland Comptroller — Nonresident Tax Instructions (Form 505); Maryland Tax-Gen. § 10-703 (allocation of income for nonresidents); DC Office of Tax and Revenue, Nonresident Instructions (D-40B).

Values verified May 2026 against Maryland Comptroller publications and Maryland FY2026 budget legislation. DC tax information verified against DC Office of Tax and Revenue 2026 guidance. Tax law changes frequently; confirm current-year values and state treatment with a qualified advisor before making irreversible decisions.