Every track has a rate type (fixed or variable), an indexation (to the Madad or not), a term and a repayment schedule. A tamhil combines them: for example a fixed unindexed part for certainty, a Prime part for flexibility and a CPI-linked part for a lower starting payment. The bank prices the whole mix, so ask every bank for the same mix.
Directive 329 treats Prime, Matz and every track whose rate can change during the loan as variable. Kalatz, Katz and the state Zakaut loan count as fixed. Since 1 October 2026 the 66.66% test covers all credit from the same bank secured on the same property, not only the new loan. Each approval in principle also shows three uniform compositions defined by the Bank of Israel next to the bank's own offer, so you can compare banks.
The pitfall is that the mix that looks cheapest on day one can be the riskiest. The more of the loan sits in Prime and reset tracks, the more your payment moves with interest rates; the more sits in indexed tracks, the more it moves with inflation. Stress-test your payment before you choose, for example in the Ribit simulator.
Example
On a ₪1,200,000 loan at most ₪799,920 may be variable, so at least ₪400,080 must be fixed. Three equal parts of ₪400,000 (Kalatz, Prime and Matz) miss the limit by ₪80: the variable share is 66.67%, just above 66.66%. Moving ₪80 from Prime or Matz into Kalatz fixes it.