Seattle Paycheck Calculator delivers accurate net pay for 2026 using salary or hourly inputs. Estimate taxes, PFML, WA Cares, RSU, bonus income, overtime, commuter benefits, and 401(k). Clear results reveal take-home pay, employer cost, and true hourly value for workers in Washington.

Annual Gross Pay ($)

Pay Frequency

Federal Filing Status

State (WA)

YTD Gross Earnings ($) FICA/PFML Caps

401(k) / 403(b) %

401(k) Type

Employer Match %

Exempt from WA Cares (LTC)

L&I Rate ($/Hour)

Health/HSA Deductions are FICA Exempt (Standard)

Health Ins. (Pre-Tax) $

HSA / FSA (Pre-Tax) $

Dependent Care FSA $

Step 2(c) Checkbox (Higher Withholding)

Step 3 Credits ($)

Step 4(a) Other Income ($)

Step 4(b) Deductions ($)

Step 4(c) Extra Withholding ($)

RSU Vesting ($)

Annual Bonus ($)

Bonus Method

Tip Income ($)

Union Dues (Post-Tax)

ORCA Transit (Pre-Tax)

Parking (Pre-Tax)

Monthly Commute Cost ($)

Weekly Commute Hrs

Monthly Rent ($)

Garnishments/Child Support

Inputs Used by the Seattle Paycheck Calculator

The Seattle Paycheck Calculator operates based on several categories of data entry, each of which is assigned a specific variable in the calculation logic.

Compensation and Frequency Data

Annual Gross Pay: The total yearly salary before any subtractions. In the code, this is divided by the pay frequency to establish the period gross.
Hourly Rate and Shift Differential: For hourly calculations, these two values are summed to create the base rate.
Regular and Overtime Hours: Standard hours (up to 40) and overtime hours (weighted at 1.5 times the base rate) are used to determine periodic earnings.
Pay Frequency: A divisor (52, 26, 24, or 12) applied to annual figures to find the amount per pay period.
Unpaid Time Off (Days): A reduction input that subtracts a daily rate, calculated as (Annual Salary / 260), from the gross pay.

Federal Tax Parameters

Filing Status: A selector for Single, Married Filing Jointly, or Head of Household, which dictates the standard deduction and tax bracket thresholds used.
W-4 Step 2(c) Checkbox: A boolean toggle that switches the calculation to a secondary set of tax tables (B_2C) with higher withholding rates.
W-4 Step 3 Credits: An annual dollar amount that directly reduces the calculated federal income tax.
W-4 Step 4(a) and 4(b): Inputs for “Other Income” (added to the taxable base) and “Deductions” (subtracted from the taxable base).
W-4 Step 4(c) Extra Withholding: A fixed dollar amount added to the federal tax output for every pay period.

Benefits and Washington State Specifics

401(k) Contribution Percentage: A percentage of gross pay diverted to a retirement account. The “Type” selector (Traditional or Roth) determines if this is subtracted before or after federal tax calculation.
Pre-Tax Deductions (Section 125): Includes Health Insurance, HSA/FSA, and Dependent Care FSA. These are subtracted from the gross income before federal and, in most cases, FICA taxes are applied.
Commuter Benefits: Pre-tax inputs for ORCA Transit and Parking, which reduce the taxable federal base.
WA Cares Exemption: A checkbox that, when unchecked, applies a 0.58 percent tax to the Washington taxable base.
L&I Rate: A worker-paid insurance premium calculated as (Rate per Hour * Total Hours worked).

How the Seattle Paycheck Calculator Works

The calculation sequence of the Seattle Paycheck Calculator follows a linear progression through the following mathematical steps:

1. Establishing the Gross Taxable Base

The tool first determines the period gross. If the user is salaried, the formula is (Annual Salary / Frequency). If hourly, it sums the (Base Rate + Shift Differential) multiplied by (Regular Hours) and adds the (Base Rate + Shift Differential * 1.5) multiplied by (Overtime Hours). If “Unpaid Days” are present, the gross is reduced by (Annual Salary / 260 * Days).

2. Applying Pre-Tax Deductions

The calculator identifies which deductions are “FICA Exempt.” If the health insurance exemption is active, it sums Health, HSA, FSA, and Commuter benefits and subtracts them from the gross to find the “FICA Base.” For the federal taxable base, it also subtracts the Traditional 401(k) amount.

3. Federal Income Tax Computation

The tool annualizes the federal taxable base by multiplying it by the pay frequency. It adds Step 4(a) income and subtracts Step 4(b) deductions and the filing-specific standard deduction (Single: 15,000; Married: 30,000; Head of Household: 22,500). The resulting “Taxable Annual Income” is passed through the 2026 tax brackets:

10% Bracket: Up to 11,925 (Single) / 23,850 (Married).
12% Bracket: Up to 48,475 (Single) / 96,950 (Married).
22% Bracket: Up to 103,350 (Single) / 206,700 (Married).
24% Bracket: Up to 197,300 (Single) / 394,600 (Married).
32% Bracket: Up to 250,525 (Single) / 501,050 (Married).
35% Bracket: Up to 626,350 (Single) / 751,600 (Married).
37% Bracket: For all income above the 35% threshold.

4. Washington State Payroll Deductions 2026

The calculator computes state-specific assessments:

Washington Cares Fund: 0.0058 * Washington Taxable Base.
WA PFML: The code calculates the total premium at 0.0074, then takes 71.43 percent of that as the employee share, capped at an annual wage of 176,100.
L&I: Multiplies the user’s hourly L&I rate by the hours worked in the period.

5. Supplemental Income Logic

For RSUs and Bonuses, the tool applies one of four methods:

Flat 22% or 37%: Multiplies the supplemental amount by the fixed rate.
Include: Adds the amount to the period gross and annualizes it.
Aggregate: Calculates tax on the total annual income (including bonus) and subtracts the tax calculated on just the regular wages.

Results and Metrics Explained

The Seattle Paycheck Calculator generates specific outputs that represent the mathematical conversion of gross earnings into net values.

Net Pay: This is the “Take Home” amount. It is calculated as (Gross Pay – Federal Tax – FICA Taxes – WA State Taxes – Pre-tax Deductions – Post-tax Deductions).
True Hourly: This metric represents a “Seattle hourly wage after taxes” calculation. It uses the formula (Net Pay – Monthly Commute Costs / (Total Hours worked + Weekly Commute Hours)).
Employer Cost: The “Total Burden” includes the Gross Pay plus the employer’s matching Social Security (6.2%), Medicare (1.45%), FUTA (0.6% on first 7,000), WA SUTA (2.0% on first 68,500), and the employer’s share of WA PFML and 401(k) match.
401(k) Tax Savings: This is the (Traditional 401k Contribution * Marginal Tax Rate). It represents the portion of the contribution that was not withheld as federal tax.
Stock Sale Gap: Defined as (RSU amount * Marginal Rate) minus (RSU amount * 0.22). It represents the difference between the statutory 22% withholding and the user’s actual tax bracket.

Interpreting the Calculation Output

The numeric outputs of the Seattle Paycheck Calculator indicate specific fiscal directions based on the code’s logic.

A higher Net Pay percentage relative to the Gross Pay indicates a lower effective tax rate, often resulting from higher Step 3 credits or pre-tax benefit contributions. If the Withholding Status indicates “High Withholding,” it means the calculated tax rate exceeds 35% of the gross income. Conversely, if the rate is below 5% for an annual wage over 30,000, the tool indicates a “Likely to Owe” status.

The Social Security Progress Bar tracks the YTD gross against the 176,100 limit. A value of 100% indicates that no further Social Security or PFML employee taxes will be deducted for the remainder of the year. The Rent Ratio provides a percentage of (Monthly Rent / (Net Pay * Periods per Month)), where higher percentages indicate rent consuming a larger portion of the take-home pay.

Assumptions and Calculation Limits

The calculation logic within the Seattle Paycheck Calculator is restricted by the following constants and simplifications:

State Income Tax: All calculations assume a 0% state income tax rate, as the code does not contain logic for states outside of Washington.
Daily Rate Basis: The “Unpaid Days” logic is hard-coded to assume a 260-day working year, which does not account for specific corporate holiday calendars.
Estimated SUTA: The Washington SUTA (State Unemployment) rate is fixed at 2.0% in the employer cost formula; actual employer rates vary based on experience ratings.
Fixed Caps: The 176,100 cap for Social Security and PFML is a static value within the 2026 constant set.
Rounding: The tool utilizes standard decimal rounding to two places for all currency outputs.

Estimation Disclaimer

The figures produced by the Seattle Paycheck Calculator are mathematical estimates based on the provided code logic and the 2026 tax tables. These results are for modeling purposes and may vary from actual payroll documentation due to specific employer configurations or local tax variations. Actual net pay is determined by official payroll systems and current IRS and Washington Department of Revenue regulations.

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