Heter Iska

A heter iska (Hebrew for "business permit" or "permission for an investment") is a contractual arrangement in Jewish law that structures a transfer of money, wholly or partly, as an investment in the recipient's business rather than as a loan. Because the provider of funds is treated as an investor sharing in the venture's results, the return it receives counts as investment profit rather than as interest, which Halacha forbids between Jews under the prohibition of ribbit.

The heter iska is used in personal and business lending between observant Jews, in mortgages and commercial credit from Jewish-owned institutions, and by Israeli banks, which operate under a general heter iska covering their dealings with customers.

The underlying structure, the iska, is discussed in the Talmud. When one person gives another money to trade with, the Talmud treats the arrangement as half loan and half deposit. The recipient bears the risk on the loan half, while the provider bears the risk on the deposit half and shares in its profit. To avoid even an appearance of ribbit, the recipient must receive some benefit for managing the provider's portion.

As credit became central to Jewish commercial life in early modern Central and Eastern Europe, rabbinic authorities developed standard documents that adapted this structure to ordinary business finance. The forms that emerged, refined by later poskim, became known as the heter iska, and printed versions are widely used today.

A typical heter iska document provides that:

• the funds are an investment in the recipient's business or assets, not a simple loan, with some or all of the money treated as the investor's share;
• profits and losses on the investor's share are divided according to an agreed formula;
• the recipient may claim a loss or a lower profit only by proving it to a stringent standard, for example by the testimony of qualified witnesses or by a formal oath;
• the recipient may avoid that proof by paying the investor a fixed sum stated in the contract, which in practice equals the return the parties expect.

The effect is that the investor almost always receives the agreed fixed amount, because the recipient chooses to pay it rather than undertake the burden of proof. Supporters say this reflects an honest estimate of the investor's profit share; the structure remains valid in Jewish law because the recipient genuinely has the option of proving a lower result.

A businessman asks a friend to advance US$100,000 for two years and is willing to pay 6 percent a year. A simple loan at interest would breach ribbit. Instead they sign a heter iska. Under it, the US$100,000 is invested in the businessman's enterprise, and he undertakes that, unless he proves otherwise through the specified procedures, the investor's share of profit will be US$6,000 a year. At the end of two years he returns the principal with US$12,000 in profit. If the business genuinely failed and he could prove it as the contract requires, the investor would share the loss.

The heter iska has parallels in Islamic finance, which also replaces interest-bearing loans with profit-sharing contracts. The iska resembles mudarabah, in which one party supplies capital and the other manages it, and musharakah, in which both contribute capital. Islamic law, however, does not permit the capital provider to receive a guaranteed fixed return in a profit-sharing contract, whereas the heter iska achieves an effectively fixed return through the proof mechanism. The prohibition on riba also applies to all lending, while ribbit applies to loans between Jews.

Some authorities have criticized the heter iska as a formality that permits in substance what the law forbids, particularly when used for consumer loans where the borrower has no business to invest in. Others accept it as a legitimate legal structure, provided the parties understand and sign the document and the funds are used in a way that can generate profit. Many poskim advise that the document be signed before the money is transferred and that each party know what it contains.

Disputes over a heter iska are generally heard before a beit din. A heter iska is not needed when no return is sought, as with the interest-free loans made by a gemach.