No 30-year fixed default
In the US the typical borrower takes one fixed-rate loan for 30 years. In Israel the bank splits your mortgage into tracks, and by Bank of Israel rule at most 66.66% may be variable, which means at least a third must be fixed. You may put the whole loan in fixed tracks (Kalatz, or Katz if you accept CPI linkage), but Kalatz usually costs more at the start.
A part in Prime moves with each Bank of Israel decision. A part that is CPI-linked grows with the Madad: if you owe ₪1,000,000 and inflation is 2% in a year, the index adds about ₪20,000 to the balance. US mortgage balances do not work this way.
Refinancing and early repayment
In the US a prepayment penalty is not on every loan, and where it exists it is limited by federal rules (2% of the balance prepaid in the first two years, 1% in the third, none after). In Israel the early-repayment fee is a formula set by a Bank of Israel order. Prime and the Zakaut loan have no capitalization fee. On Kalatz and Katz you owe one only if the Bank of Israel's average rate today is below both your rate and the average when you borrowed, reduced by 20% after 3 years and by 30% after 5.
Example: ₪800,000 on Kalatz at 5.3% with 18 years left, when the average is 4.4%. The gross fee is about ₪63,400, and waiting until the loan is 3 years old cuts it by 20%. When the new rate is close to the average, the fee absorbs most of the gain. Refinancing pays off mainly when the part you move is Prime or at its reset date, when you get well below the average, or when you use it to shorten the term.
Income, down payment and Zakaut
Israel has hard limits that most US lenders leave to their own policy: payment at most 50% of disposable income, loan at most 75% of the price for a single home, 70% for a replacement home and 50% for an investment property or a buyer who is a foreign resident under the directive. Ask the bank how it classifies you. US citizens and residents should also expect the bank to ask for a W-9 form under FATCA.
As an oleh you can also qualify for Zakaut, the state eligibility loan, for 15 years from receiving immigrant status. It is a supplement to your mortgage, not a replacement: a fixed rate capped at 3%, CPI-linked, with no early-repayment fee.