Q. How do I calculate the tzedakah on the sale of a house? If I still have a mortgage, do I deduct it as well as the original cost of the house? What about the real-estate, land transfer tax, HST and other fees? What if this leads me with a shortfall to buy another property? Can I  use the profit and have my estate take care of the final cheshbon?

A. Horav Shlomo Miller’s Shlit’a opinion is that if one would be unable to pay for the new house if he gives at that point Maaser after having deducted all expenses that had to be paid, he may delay the Maaser to the future after he aquires the needed new house and can actually afford it.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller, Horav Dovid Pam, Horav Aharon Miller, Horav Chanoch Ehrentreu and Horav Kalman Ochs Shlit’a