StructureCost2026

Quarterly estimated tax in New Hampshire (2026)

A sole proprietor in New Hampshire with $100,000 of profit pays the IRS about $4,903 a quarter. Put in your own profit to get the four payments and their dates.

$4,903 a quarter

to the IRS. Four payments make $19,612 for the year, which meets 90% of this year's tax. This year's federal tax on this profit: $21,793 (income tax $7,928, self-employment tax $13,865).

New Hampshire, 2026: $100,000 profit, single filer

IRS dueIncome earnedIRS
April 15, 2026January 1 to March 31$4,903
June 15, 2026April 1 to May 31$4,903
September 15, 2026June 1 to August 31$4,903
January 15, 2027September 1 to December 31$4,903
Year$19,612

New Hampshire has no personal income tax, so only the IRS payments apply. Estimates assume a single-member business with no withholding.

New Hampshire estimated tax rules for 2026

Payments at each profit

ProfitIRS each quarterNew Hampshire for the year
$50,000$2,190$0
$100,000$4,903$0
$150,000$8,076$0
$250,000$13,854$0
$500,000$35,379$0

A sole proprietor or single-member LLC, single filer, no withholding, paying 90% of this year's federal tax.

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