how do you calculate the Finance charge?

Could you clarify a little more for us? Is it a specific finance charge or all the charges applied to a mortgage loan? Mortgage Brokers or bankers generally have a certain amount of money per each loan to work with in terms of best offer they can provide a borrower in both finance costs and in rate. Most lenders have fees for Processing and Underwriting, and sometimes some additional smaller fee for Admin. Remaining fees mostly come from the escrow and title companies. Otherwise you have a fee to the appraiser, government recording & transfer taxes if a purchase loan, and miscellaneous fees to home inspector and/or termite inspector. Finally, some fees can be absorbed often with just one eighth in rate higher, and even more fees at each eighth higher to a certain point. That is why many people refinance at 0 closing costs or some borrowers get $1500, $3000, $4500 or higher lender credit towards their home purchase closing costs.