Free · CA → OR split-year estimator · 2026

Estimate your split-year taxes.

Enter your move date and pay. The calculator splits your wages the way the returns do, runs each state's 2026 rate schedule on a full-year basis, takes each state's share, and checks the two Portland-area taxes with no withholding. Estimates only, for planning, not for filing.

Your move year
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The Metro boundary is not a county line. Check your exact address at portland.gov/revenue before relying on this.
Dates decide the column here: pay landing before the move date counts as California, on or after as Oregon. Section 6 of the playbook covers when the award period overrides the pay date for bonuses, and how RSUs really allocate workdays from grant to vest.
Your wage split
California · 540NR
Oregon · OR-40-P
The Portland surprise · $0 withheld
Metro SHS · 1% over $125,000
Multnomah PFA · 1.5% over $125,000
Due with the local returns, nothing withheld
Filed separately at Portland Revenue Online, not on your Oregon return. Playbook section 7 covers registration, the cash plan, and the opt-in withholding form.
Estimated state + local, move year
Before withholding already paid to either state
Now make April boring.
The playbook turns these numbers into a punch list: the payroll forms, the residency evidence, the estimate vouchers, and the Portland registrations, in order.
Get the playbook · $39 info@statesplit.com
2026 data · update annually Wages and 401(k) split by days of residency; bonus and RSU amounts follow their pay or vest date. Each state's tax is computed on full-year income less its standard deduction ($5,700 CA estimated, $2,745 OR single) using 2026 rate schedules, then multiplied by that state's share of wages: the resident-ratio method both returns use. California's 2026 brackets are estimates pending final inflation adjustment. Not modeled: itemized deductions, credits, other income types, Oregon's federal-tax subtraction (phases out above roughly $145,000 AGI), California's mental-health surtax above $1M, and the local returns' own proration. Reproduces the playbook's worked example: $2,749 CA and $13,039 OR. Estimates only, not advice; confirm every figure on the current form before filing.