Quick answer: up to 6.6% for 2026, with no separate rate for how long the house was held. See the full cost picture in the Delaware probate real estate sale calculator.
No distinction the federal government makes
Seven brackets, topping out quickly
Delaware's 2026 income tax runs seven brackets from 2.2% to 6.6%, with the top rate applying to income at or above $60,000 — most working residents reach the top bracket.
One city adds its own layer, for wages
Wilmington collects its own individual income tax of 1.25%, the only Delaware jurisdiction to do so — though this applies to earned income rather than a real estate sale gain specifically.
No estate or inheritance tax layered on top
Delaware imposes neither a state estate tax nor an inheritance tax, so this income tax on the gain is the only state-level tax question the sale itself raises.
A local probate attorney can review your estate — many offer a free consultation.
The same bracket schedule applies whether the sale closes in New Castle, Kent, or Sussex County.