SDI tax is one of those payroll items that never causes problems until it does. The deduction is small, the program is local, and most multi-state employers assume the payroll provider is handling it correctly. Then an employee files a disability claim and discovers their SDI contributions weren't withheld properly, or an audit letter from California EDD lands with two years of retroactive assessments. State disability insurance programs are narrow in scope, but because they're concentrated in just a handful of high-population states, the compliance risk disproportionately lands on large employers with distributed workforces. Understanding which states tax, what rate applies, and who bears the cost is non-negotiable for anyone running payroll in the affected jurisdictions.
Which States Tax SDI and How the Programs Work Five US states plus Puerto Rico require SDI. California, Hawaii, New Jersey, New York, and Rhode Island each run their own program with different rules, rates, and benefit structures. California's is the largest, providing up to 60-70 percent wage replacement for eligible disabled workers, with Paid Family Leave funded by the same contributions. New Jersey and Rhode Island also include family leave coverage.
Hawaii and New York use private insurer models: employers must provide statutory disability coverage through a licensed insurer or a self-insured plan, with employee contributions allowed up to a statutory cap. New Jersey's and California's are state-administered funds, with contributions flowing to the state.
Who Pays SDI Tax, Employer or Employee? Most states put the burden primarily on employees. California SDI is 100 percent employee-paid. New York is primarily employee-paid with a small employer contribution allowed. New Jersey splits between employee and employer. Hawaii allows employee contributions up to 50 percent of the premium. Rhode Island is 100 percent employee-paid. For 2026, California's rate is 1.2 percent on all wages (with no wage cap), one of the most expensive SDI programs by total employee cost.
SDI Rates and Wage Bases Change Each Year Every SDI state updates its rate, wage base, or both annually. California removed its wage cap in 2024 and continues taxing all wages at the current rate. New York, New Jersey, and Rhode Island update their taxable wage bases each year based on statutory formulas tied to average weekly wage. Hawaii publishes annual contribution caps tied to the state average weekly wage.
Payroll systems should be configured to pull updated rates automatically each January, but employers shouldn't assume the update is correct. Verify with each state's agency each year before the first January pay run closes.
How Does SDI Relate to Federal Programs? Federal Social Security Disability Insurance (SSDI) is separate from state SDI. SSDI is a federal long-term disability benefit for employees with severe, long-lasting disabilities. State SDI is short-term, covering typical post-surgical recovery, extended illness, and pregnancy-related conditions. An employee can collect both if they qualify, subject to offset rules.
SDI Compliance for Multi-State Employers Multi-state employers face the hardest SDI compliance landscape. An employee whose work state is California but whose residence is Arizona is typically subject to California SDI, but sourcing rules vary and remote work has introduced genuine uncertainty. The state where the work is performed is usually the determining factor, with some exceptions for residency and employer location.
Getting this wrong produces two problems: underwithholding (which can't be recovered from the employee after the fact without their consent) or overwithholding (which creates refund obligations and employee frustration). Run a quarterly review of employees in SDI states against their actual work location. Payroll systems should flag mismatches automatically.
Managing SDI Tax as Part of Payroll Compliance SDI tax is a small line item that can create outsized risk if mishandled. Keep current on each state's annual rate update. Audit work-location assignments quarterly, especially for remote employees. Train payroll staff on when to apply SDI to bonuses, commissions, and deferred compensation (rules vary by state). The Social Security Administration's Disability Benefits overview explains the federal program that complements state SDI. For context on related payroll concepts, see payroll and net pay , both of which flow from accurate SDI withholding.
.svg)
.svg)
