How New York's tax environment affects the W2 vs 1099 comparison.
New York State income tax reaches 10.9% at the highest bracket. NYC residents pay an additional city income tax (3.08-3.876%). Both W2 and contractors pay the same state/city rates — the contractor disadvantage comes from federal SE tax and lost benefits. NYC's high cost of living also affects how much health insurance and other benefits are worth there.
Use 6.85% as your state income tax rate in the calculator.