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New Mexico vs South Carolina RSU Tax

South Carolina withholds $50 more state tax than New Mexico 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

South Carolina withholds more state tax

$50 more state tax — net gap ~$50 ($33,186 vs $33,136).

Side-by-side RSU withholding scoreboard

New Mexico

$2,950

5.9% state

Total withheld
$16,814
Net RSU
$33,186
Federal + FICA
$13,864
Rank
#14
New Mexico profile →

Total withholding gap: $50 (state drives most of the difference).

Key takeaways — New Mexico vs South Carolina RSU tax

  • South Carolina withholds about $50 more state tax ($2,950 vs $3,000).
  • New Mexico: 5.9% (Published flat supplemental). South Carolina: ~6% est. (Aggregate / table (estimate)).
  • Federal withholding is $11,000 in both states on this vignette (22% flat per IRS Pub. 15); FICA is $2,864 each.
  • New Mexico ranks #14; South Carolina ranks #12 (#1 = highest state withholding).
  • Model custom RSU vests at /rsu-tax-calculator.

Rule contrast — New Mexico vs South Carolina

TopicNew MexicoSouth Carolina
Withholding methodPublished flat supplementalAggregate / table (estimate)
Supplemental rate5.9%~6% est.
Vignette state tax$2,950$3,000
Vignette federal + FICA$11,000 + $2,864$11,000 + $2,864
Vignette total withheld$16,814$16,864
Vignette net$33,186$33,136
Rank (curated)#14#12

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.

RSUNew Mexico stateSouth Carolina stateState gapNM netSC net
$15,000$885$900$15$9,667.50$9,652.50
$50,000$2,950$3,000$50$33,186$33,136
$100,000$5,900$6,000$100$68,061$67,961
$250,000$14,750$15,000$250$172,686$172,436

How to read this page

New Mexico vs South Carolina RSU tax in 2026

This page compares state supplemental withholding for New Mexico (NM) and South Carolina (SC) 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).

South Carolina is higher by about $50 in state tax alone; net take-home favors New Mexico by about $50.

Published state supplemental withholding at 5.9% on RSUs and other supplemental wages.

No published flat supplemental rate (aggregate / table method). Educational estimate ≈6% — confirm with payroll tables.

How each state’s rate works

New Mexico (Published flat supplemental): about 5.9% → $2,950 on the vignette.

South Carolina (Aggregate / table (estimate)): about 6% → $3,000 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 New Mexico vs South Carolina comparison helps

Useful if…

  • •Candidates weighing New Mexico vs South Carolina 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

New Mexico vs South Carolina checklist

Before treating the withholding gap as a job or relocation decision.

  1. 1Confirm New Mexico and South Carolina supplemental rules with each revenue department.
  2. 2Ask which withholding method payroll uses (flat vs aggregate).
  3. 3Check the RSU vest ladder for your award size.
  4. 4Open /rsu-tax-by-state/new-mexico and /rsu-tax-by-state/south-carolina for full profiles.
  5. 5Run both scenarios in /rsu-tax-calculator.

Vignette net: $33,186 (NM) vs $33,136 (SC).

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.

New Mexico vs South Carolina RSU tax FAQs

South Carolina withholds about $50 more in state tax ($2,950 vs $3,000).

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.

New Mexico: 5.9%. South Carolina: ~6% est..

New Mexico, by about $50.

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.