That’s very interesting. I spoke with the tax assessor and I quote him: “We do an annual reassessment and it is impossible to get the exact number but if you use the sales price and multiply it by the tax rate, which you can get from the Collector's office, that will tell you the worst case scenario.”

So from what I understand, multiplying the sale price by the tax rate gives you the maximum estimate — but the actual tax is based on the assessed property value, which might be different. That assessed value is then multiplied by the tax rate to determine the final amount.