The Math:

The amount of the mansion tax paid depends on purchase price and commission. Here are examples:

1. Mansion Tax Fully Paid 

A. On an apartment of $2.75 M the mansion tax is 1.25% or $34,375. 

B. If the commission (paid by the developer) is 3%, Eschewal receives $82,500, half of which is $41,25.

C. ESCHEWAL pays the full tax of $34, 375.

2. Another Example of a Mansion Tax Fully Paid

A. The apartment costs $3.5 M. At this level the mansion tax is 1.5% or $52, 500.

B. If the commission (paid by the developer) is 3%, Eschewal receives $105,000, half of which is $52,500.

C. ESCHEWAL pays $52,500 to satisfy your entire tax.

3. Mansion Tax Partially Paid

A. The same apartment as in #1 costs $2.75 M with the same mansion tax of 1.25% or $34,375.

B. If the commission (paid by the developer) is 2% rather than 3% Eschewal receives $55,000, half of which is $27,250.

C. ESCHEWAL pays $27,250 towards your $34,375 tax.

4.  Another Example of a Mansion Tax Partially Paid 

A. The same apartment as in #2 costs $3.5 M with the same mansion tax of 1.5% or $52,500.

B. But If the commission (paid by the developer) is 2%, rather than 3% Eschewal receives $70,000, half of which is $35,000.

C. ESCHEWAL pays $35,000 towards your $52,500 tax.

5. Third Example of a Mansion Tax Partially Paid 

A. On an apartment of $5.5 M the Mansion Tax is 2.25% or $137, 500.

B. If the commission (paid by the developer) is 2%, Eschewal receives $110,000, half of which is $55.000.

C. ESCHEWAL pays $55,000 toward your $137,500 tax.