Quarterly Tax Estimator for Delaware

Quarterly estimated payments in Delaware must cover both your federal and state obligations. Delaware uses graduated rates (2.2-6.6%), and most states require their own quarterly payment schedule that may differ from the IRS dates. If your Delaware locality imposes income tax, you may need a third set of quarterly payments. This estimator pre-loads Delaware's tax rates so you can calculate both federal and state quarterly amounts in one place, avoiding underpayment penalties at both levels.

Delaware uses a graduated income tax with brackets ranging from 2.2-6.6%. Lower income is taxed at lower rates, with the 6.6% top rate applying only to income in the highest bracket. This progressive structure means your effective state tax rate is always lower than the top marginal rate. In addition, some Delaware localities impose their own income tax, which stacks on top of the state rate. This is especially notable in areas like certain cities and counties. Always check your local rate when calculating total tax liability.

The table below shows what you actually keep at five salary levels in Delaware, accounting for federal tax, FICA, and Delaware's graduated (2.2-6.6%) state tax plus estimated local taxes.

See how Delaware compares to other Northeast states. Each link takes you to the quarterly tax estimator landing page for that state.

For a comprehensive breakdown of Delaware’s tax structure, salary comparisons, cost-of-living analysis, and more, visit the full Delaware take-home pay page.