SCI (Société Civile Immobilière), Loan In Fine, modularity and IRA (Early Repayment Allowance) at 0, ... are all ways to make real estate investment tax-efficient and highly profitable. And this, in a context where many regulatory changes are underway: right of pre-emption, tax on vacant housing, measures against speculation, ... CAFPI, it is the guarantee to be accompanied by a professional in the optimization of an investment.