Delaware State Income Tax Guide (2026)

Delaware's progressive brackets compress quickly. The 0% bracket covers only the first $2,000 of taxable income; 2.2% to $5K; 3.9% to $10K; 4.8% to $20K; 5.2% to $25K; 5.55% to $60K; 6.6% above $60K. So for most working professionals with taxable income above $60K, the marginal rate is 6.6% on every dollar above the threshold — comparable to or slightly above CT (6.99% top), VA (5.75% top), NC (3.99% flat), and lower than NY (10.9% top) or NJ (10.75% top).

Standard deduction is unusually low at $3,250 single / $6,500 MFJ — dramatically below the federal $16,100 / $32,200. The personal exemption is a $110 tax credit per filer (not a deduction off taxable income). Net effect: DE taxable income tracks much closer to gross than federal taxable income, so more income falls into higher brackets than the same income would in a federal-SD-conforming state.

The structural offset is Delaware's lack of a state sales tax. One of only 5 states (AK, DE, MT, NH, OR) without one. For a household spending $40K/year on taxable goods, this saves roughly $2,400-$3,600/year versus the 6-8% combined sales tax in neighboring NJ, PA, MD, or NY. Cross-border shopping into DE is a real economic phenomenon — many NJ, PA, and MD residents drive across state lines for big-ticket purchases (electronics, appliances, vehicles) where the tax savings clear the gas-and-time cost.

Wilmington levies a 1.25% tax on wages earned for work physically performed within Wilmington city limits — applies to both residents and non-residents working at city-limit employers. The tax is withheld by employers and remitted directly to Wilmington City; most workers don't file a separate Wilmington return. Workers based in Wilmington but living in suburban DE still owe the wage tax on their Wilmington workdays. Hybrid workers should track workdays — only physical-Wilmington-presence days count.

Where you live matters more than the wage tax. A New Castle County professional working downtown but living in Newark, Hockessin, Greenville, or Pike Creek pays the 1.25% only on the city-limit workdays. A Wilmington-resident peer pays the 1.25% regardless of where they work. For typical $130K compensation, that's about $1,625/year of Wilmington tax for a full-time downtown worker — meaningful but smaller than the property tax delta between Wilmington proper and the surrounding suburbs. Suburban living usually wins on combined tax + housing math.

The no-sales-tax angle is Delaware's structural consumption advantage and the underrated half of the tax pitch. Combined state + local sales taxes in neighboring NJ (6.625%), PA (6% + Philly 2% = 8%), MD (6%), and NY (4% state + local up to ~4.5% = ~8.5%) mean a typical household spending $40K/year on taxable goods saves $2,400-$3,600/year just by living in Delaware. Cross-border shoppers from the surrounding states have made the Christiana Mall, Rehoboth outlets, and Tanger Outlets meaningful regional retail destinations. The dollar savings for an actual DE resident on the same purchases compound year after year over a working career or retirement.

Four scenarios that cover most readers. Find the one closest to you. If none match, the calculator at the top is for you.

Delaware property tax statewide effective average is approximately 0.43% on market value — among the very lowest in the country (national average ~1.10%). The structural reason is that Delaware doesn't fund schools primarily through property tax the way Iowa, New Hampshire, or New Jersey do. State-level revenue (corporate franchise taxes, personal income tax, abandoned property revenue) carries more of the school-funding load, keeping county and municipal property tax mill rates low.

Approximate effective rates by county on a primary residence: New Castle (Wilmington area + Newark + Pike Creek + Hockessin) 0.50-0.65%, Kent (Dover area) 0.40-0.55%, Sussex (Lewes / Rehoboth Beach / Bethany Beach / Ocean View) 0.30-0.45%. Sussex County's beach-area effective rates are remarkably low even on high-value resort properties — a $700K Rehoboth condo carries $2,100-$3,150/year in property tax, dramatically below the $14,000-$18,000 the same value would cost in equivalent NJ or Long Island retirement housing.

Wilmington and a handful of other DE municipalities also levy a small city property tax in addition to the county levy, but the combined city + county effective rate still lands well below the 1% national average. Sussex County's low rates are the structural quiet reason for the steady retiree migration from NY, NJ, PA, and DC — the property tax savings alone, compounded annually, often cover meaningful portions of beach-home mortgage payments versus equivalent retirement living in higher-tax states.

On top of the annual mill, Delaware levies a real estate transfer tax of 4% on residential sales (split between buyer and seller, with first-time-buyer exemptions). High relative to other states for transactions, but a one-time cost rather than annual. The OBBBA SALT cap raise to $25K softens the annual property tax deductibility for the small share of high earners affected.

If you're earning $100K+ in DE and you're not doing most of these, you may be leaving real money on the table. None of this is exotic. Most of it is 30 minutes of setup once a year and discipline the rest of the year.

Delaware is an underrated tax state, especially for retirees. The 6.6% top rate sounds high but is competitive with peer Mid-Atlantic states (CT 6.99% top, NJ 6.37% on most professionals' income, MA 5% flat plus 4% surtax above $1.1M, NY higher) — and the combination of NO state sales tax + ~0.43% statewide property tax (among the lowest in the country) + recent estate tax repeal (2018) + generous $12,500 pension exclusion for filers 60+ makes Delaware one of the friendliest total-state-and-local-tax-burden states in the Northeast. The 1.25% Wilmington wage tax is the small wrinkle that affects city workers specifically.

Run your numbers in the calculator above. The DE state line uses the full bracket-by-bracket schedule and should match your actual Form 200-01 closely.

If you live or work in Wilmington, add the 1.25% wage tax manually — the calculator doesn't model municipal layers. If you're 60+, verify the $12,500 pension exclusion is being claimed on your DE return (the calculator handles this if filing age is set correctly).

If you're under-saving in retirement accounts, fix that this month before any other tax move. The biggest tax mistake most Delawareans make isn't paying too much DE state tax — it's missing the pension exclusion at 60+, forgetting the Wilmington wage tax when commuting changes, or leaving thousands on the table in 401(k) and HSA shelter that's pre-tax for DE as well as federal.