For adjustable rate loans, the "total payments" figure is estimated as a "worst case" scenario. The figure represents the payments you would make if your loan adjusted upward to the maximum rate allowed by annual and lifetime caps and then stayed there for the duration of the loan.

The TIL statement may also contain information on security interest, late charges, prepayment provisions, and whether the mortgage is assumable. If you have an adjustable rate loan, it may outline the limits on the adjustments (annual and lifetime caps) and give an example of what your next year's payment might be, depending on interest rates.