Mississippi
$2,000
~4% est. state
- Total withheld
- $15,864
- Net RSU
- $34,136
- Federal + FICA
- $13,864
- Rank
- #32
Compare different states
2026
2026Mississippi vs Iowa RSU Tax
Mississippi withholds $100 more state tax than Iowa on $50,000 RSU vest (100 shares × $500 FMV) with $150,000 other annual income (flat supplemental method).
By Sammy S. · Founder · AuthorUpdated for 2026
Key finding
Mississippi withholds more state tax
$100 more state tax — net gap ~$100 ($34,136 vs $34,236).
Side-by-side RSU withholding scoreboard
Iowa
$1,900
3.8% state
- Total withheld
- $15,764
- Net RSU
- $34,236
- Federal + FICA
- $13,864
- Rank
- #33
Total withholding gap: $100 (state drives most of the difference).
Key takeaways — Mississippi vs Iowa RSU tax
- Mississippi withholds about $100 more state tax ($2,000 vs $1,900).
- Mississippi: ~4% est. (Aggregate / table (estimate)). Iowa: 3.8% (Published flat supplemental).
- Federal withholding is $11,000 in both states on this vignette (22% flat per IRS Pub. 15); FICA is $2,864 each.
- Mississippi ranks #32; Iowa ranks #33 (#1 = highest state withholding).
- Model custom RSU vests at /rsu-tax-calculator.
Rule contrast — Mississippi vs Iowa
| Topic | Mississippi | Iowa |
|---|---|---|
| Withholding method | Aggregate / table (estimate) | Published flat supplemental |
| Supplemental rate | ~4% est. | 3.8% |
| Vignette state tax | $2,000 | $1,900 |
| Vignette federal + FICA | $11,000 + $2,864 | $11,000 + $2,864 |
| Vignette total withheld | $15,864 | $15,764 |
| Vignette net | $34,136 | $34,236 |
| Rank (curated) | #32 | #33 |
State withholding and net at different RSU sizes
$150,000 other annual income; engine flat supplemental method. State gap is state tax only; net is after-tax share value after sell-to-cover.
| RSU | Mississippi state | Iowa state | State gap | MS net | IA net |
|---|---|---|---|---|---|
| $15,000 | $600 | $570 | $30 | $9,952.50 | $9,982.50 |
| $50,000 | $2,000 | $1,900 | $100 | $34,136 | $34,236 |
| $100,000 | $4,000 | $3,800 | $200 | $69,961 | $70,161 |
| $250,000 | $10,000 | $9,500 | $500 | $177,436 | $177,936 |
How to read this page
Mississippi vs Iowa RSU tax in 2026
This page compares state supplemental withholding for Mississippi (MS) and Iowa (IA) on $50,000 RSU vest (100 shares × $500 FMV) with $150,000 other annual income (flat supplemental method), calculated from our engine (same engine as the RSU vest calculator).
Mississippi is higher by about $100 in state tax alone; net take-home favors Iowa by about $100.
No published flat supplemental rate (aggregate / table method). Educational estimate ≈4% — confirm with payroll tables.
Published state supplemental withholding at 3.8% on RSUs and other supplemental wages.
How each state’s rate works
Mississippi (Aggregate / table (estimate)): about 4% → $2,000 on the vignette.
Iowa (Published flat supplemental): about 3.8% → $1,900 on the vignette.
Official state agencies for this pair only are linked in the sources section — not every state in the hub.
Federal and FICA are the same on this vignette
Both states withhold $11,000 federal income tax under the Pub. 15 flat method (22% on $50,000).
FICA is $2,864 in each (Social Security + Medicare on this YTD/RSU pair). The take-home gap is almost entirely state supplemental withholding.
Above $1M supplemental wages with one employer, federal withholding uses 37% on the excess — still the same rule in both states.
Same RSU vests, different state tax
The ladder recomputes engine results at $15k–$250k RSU vests with $150,000 other annual income.
If either state uses Vermont’s 30%-of-federal rule, Wisconsin bands, or an aggregate proxy, the gap may not scale as a simple constant percentage — check each ladder row.
Signing-RSU negotiations should still include regular wage tax and cost of living — not supplemental withholding alone.
What this comparison excludes
Local city taxes (NYC, Philly wage tax, Ohio municipalities) are not included.
Aggregate-method stubs can differ from the flat-percentage estimates shown here.
Final Form 1040 liability depends on annual brackets, deductions, and credits — withholding is a prepayment.
Who this Mississippi vs Iowa comparison helps
Useful if…
- •Candidates weighing Mississippi vs Iowa offers with cash RSU vests
- •Payroll comparing multi-state supplemental setup
- •Editors quantifying high-tax vs no-tax state gaps
Use official tools if…
- •Local city taxes (NYC, Philly, Ohio municipalities)
- •Aggregate-method stubs that differ from flat rates
- •Year-end true-up if federal 22% under-withholds
Mississippi vs Iowa checklist
Before treating the withholding gap as a job or relocation decision.
- 1Confirm Mississippi and Iowa supplemental rules with each revenue department.
- 2Ask which withholding method payroll uses (flat vs aggregate).
- 3Check the RSU vest ladder for your award size.
- 4Open /rsu-tax-by-state/mississippi and /rsu-tax-by-state/iowa for full profiles.
- 5Run both scenarios in /rsu-tax-calculator.
Vignette net: $34,136 (MS) vs $34,236 (IA).
What the state gap means
Flat supplemental rates differ by state; federal 22% and FICA rules are the same. Withholding is not your final tax bill when you file.
Limits of this comparison
NYC/local taxes, aggregate-method withholding, and equity vest timing are not modeled. Use the RSU calculator for custom vest amounts and other income.
Mississippi vs Iowa RSU tax FAQs
Mississippi withholds about $100 more in state tax ($2,000 vs $1,900).
No on this vignette — both use the flat 22% federal supplemental method plus the same FICA rules. The gap is almost entirely state supplemental withholding.
Mississippi: ~4% est.. Iowa: 3.8%.
Iowa, by about $100.
No. This comparison is state supplemental withholding plus federal and FICA only.
Not on this vignette. Both use 22% flat federal supplemental withholding ($11,000) plus the same FICA rules.
Compare another pair
Compare any two states
Supplemental RSU withholding on a $50,000 vest (100×$500) with $150,000 other income.
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