Ks Cross Border

---
name: ks-cross-border
description: "Use this skill whenever asked about Kansas cross-border taxation for tax year 2026 — part-year and nonresident Kansas filing (Form K-40 with Schedule S allocation), the resident-worldwide-plus-credit structure, no reciprocity with neighboring states, no exit tax, and the resident-employee withholding rule that follows Kansas residents out of state. Trigger on \"Kansas nonresident\", \"Kansas part-year\", \"Schedule S Kansas\", \"K-40PN\", \"Kansas reciprocity\", \"moving to Kansas\". Source-cited draft; KDOR withholding-residence rule verified 2026-10-28; form IDs and credit mechanics not yet confirmed."
license: "AGPL-3.0-or-later (code) / OpenAccountants Guide License v1.0 (content)"
metadata:
  source: openaccountants
  openaccountants_url: "https://www.openaccountants.com/skills/ks-cross-border"
  jurisdiction: "US-KS"
  tax_year: "2026"
  last_updated: "2026-10-29"
  reviewed_by: "Jeff Watts"
---

# Kansas cross-border taxation, tax year 2026

> **Source-cited draft.** Built from the KDOR Withholding page, K.S.A. 79-32,110 and the KDOR 2025 individual income tax booklet, read on 2026-10-28. The nonresident-return statute and the credit statutes were not readable this run, so form routing and credit mechanics are listed under Not yet confirmed. No accountant has reviewed it.

Tax year: the calendar year for most individuals. Authority: Kansas Department of Revenue (KDOR). Currency: US dollars. Covers Kansas exposure for nonresidents, part-year residents, and Kansans working out of state; the nonresident path runs through Schedule S Part B in `ks-income-tax`.

See also: `ks-income-tax`, `ks-payroll`, `ks-corporate-income-tax`.

## Who this applies to

- **Kansas residents:** taxed on worldwide income regardless of where services are performed; employers must withhold Kansas tax for Kansas residents "performing services inside or outside of Kansas" (KDOR Withholding page).
- **Nonresidents:** taxed on Kansas-source income; Kansas employers must withhold on nonresidents performing services in Kansas (KDOR Withholding page).
- **Part-year residents:** split-year treatment via allocation on Schedule S (form detail under Not yet confirmed).
- **Entities:** corporations with Kansas-source income file K-120 (see `ks-corporate-income-tax`).

## Rates, bands and thresholds

| Item | Rate or amount | Tax year | Source |
|---|---|---|---|
| Resident and nonresident rates | 5.20% / 5.58% two-bracket schedule (break at $23,000; $46,000 married filing jointly) | 2026 | [K.S.A. 79-32,110](https://ksrevisor.gov/statutes/chapters/ch79/079_032_0110.html); see `ks-income-tax` |

## The taxable base

| Item | Rule | Source |
|---|---|---|
| Resident base | Worldwide income at Kansas rates | Residence-based withholding rule, [KDOR Withholding page](https://www.ksrevenue.gov/bustaxtypeswh.html) |
| Source rules for remote work | Income sourced where services are performed; Kansas resident remote workers are still Kansas-withheld | KDOR Withholding page |

The nonresident base and allocation, the credit for taxes paid to other states, reciprocity and exit-tax status are listed under Not yet confirmed.

## Deadlines and filing

- Form K-40 (with or without Schedule S): **April 15** for calendar-year filers (April 15, 2026 for 2025 returns; fiscal-year returns the 15th day of the 4th month) ([KDOR 2025 individual income tax booklet](https://www.ksrevenue.gov/incomebook25.html)).
- Employers' withholding remittances for nonresident employees follow the payroll calendar (see `ks-payroll`).

## Penalties and interest

- The Kansas late-filing and late-payment tiers for individuals are listed under Not yet confirmed (see `ks-income-tax`).
- Dual-residency disputes (two states claiming residence) are resolved by negotiated credits or litigation; Kansas has no special penalty for the dispute itself.

## Cross-border points

- **Kansas resident working in Missouri** (classic Kansas City metro pattern): Missouri withholds nonresident tax; Kansas taxes worldwide income. The resident credit for Missouri tax is listed under Not yet confirmed.
- **Nonresident working in Kansas:** Kansas withholds and taxes; the home state may credit Kansas tax (check the home state's rule).
- **No Kansas worldwide-unitary extension for individuals** — the state layer is source- and credit-based.

## Worked examples

Both examples assume a resident credit for tax paid to the other state, capped at the crediting state's tax on the same income. That credit mechanism is not yet confirmed for Kansas; the tax amounts are hypothetical figures showing the mechanics only.

### Example 1: Kansas resident commuting to Missouri

Kansas tax on worldwide income is $4,200; Missouri nonresident tax on the same wages is $3,800. If Kansas credits the full Missouri tax, Kansas collects $400 and the household pays $4,200 in total — the higher of the two states' tax, split $3,800 Missouri + $400 Kansas.

```oa-check
name: KS resident MO commuter credit
inputs:
  ks_tax: 4200
  mo_tax: 3800
steps:
  - credit: min(mo_tax, ks_tax)
  - ks_net: ks_tax - credit
  - combined: mo_tax + ks_net
expected:
  credit: 3800
  ks_net: 400
  combined: 4200
```

### Example 2: nonresident working in Kansas

A Missouri resident earns wages in Kansas; Kansas tax is $2,600 and home-state tax on the same income is $3,100 with a full credit for the Kansas tax. The home state collects $500; the total is $3,100.

```oa-check
name: Nonresident KS work home-state credit
inputs:
  ks_tax: 2600
  home_tax: 3100
steps:
  - credit: min(ks_tax, home_tax)
  - home_net: home_tax - credit
  - combined: ks_tax + home_net
expected:
  credit: 2600
  home_net: 500
  combined: 3100
```

## Ask the client first

1. **Where were services physically performed each day?** It drives source.
2. **Kansas residence status for the whole year or part of it?** It drives K-40 vs the Schedule S split.
3. **Employer withholding:** was Kansas withheld for a resident working out of state (required) or for a nonresident working in Kansas (required)?
4. **Home / work state credit rules:** double-tax relief here comes from credits, not exemptions.

## Sources

| Source | URL | Read on |
|---|---|---|
| KDOR Withholding (residence-based withholding, nonresident rule) | https://www.ksrevenue.gov/bustaxtypeswh.html | 2026-10-28 |
| K.S.A. 79-32,110 (individual rates) | https://ksrevisor.gov/statutes/chapters/ch79/079_032_0110.html | 2026-10-28 |
| KDOR 2025 individual income tax booklet (due dates) | https://www.ksrevenue.gov/incomebook25.html | 2026-10-28 |

Not yet confirmed: K-40PN vs K-40 + Schedule S Part B form routing for nonresidents (K.S.A. 79-32,150 page at kslegislature.org/li served only a JS shell); the nonresident base and Schedule S Part B allocation detail; part-year allocation detail; the statute, cap and ordering of the resident credit for taxes paid to other states; that Kansas has no reciprocity agreement with Missouri, Nebraska, Oklahoma, Colorado or any other state; that Kansas imposes no exit or departure tax; whether KDOR honours the federal extension for individuals; the individual late-filing and late-payment penalty tiers under K.S.A. 79-32; military residence-retention (MMRA) treatment in Kansas.

> Contributed by Jeff Watts.

## Today's figures and who stands behind this skill

This file is an AI skill (tax rules your AI follows) from OpenAccountants, copied on 2026-10-29. Rates, thresholds and deadlines change. For the current version of this skill, its official sources and the named accountant (if any) who stands behind it, call `get_skill` with slug `ks-cross-border` on the OpenAccountants connector (https://www.openaccountants.com/connect), or read https://www.openaccountants.com/skills/ks-cross-border. If neither is available, confirm every figure against the official source pages cited above before relying on it.