The impact organisations have on the economic, environmental and social levels of society Bonds (SIBs) are a type of Payment by Results or outcomes based contract. SIBs usually have 3 partners – the procurers (usually public sector); the investors and the service delivery organisation (usually third sector). Procurers agree to pay for an improvement in social outcomes (e.g. % reduction in the recidivism amongst young offenders). Investors invest in the organisation that can undertake this activity. Investors receive their investment back with interest, from the procurement agency, if the agreed social outcomes are met. Payments to investors are tapered if the social outcomes are not fully achieved, with a decreasing level of payback to the investor if lower outcomes are achieved. Operating over a fixed period of time, SIBs do not offer a fixed rate of return. Repayment to investors is contingent upon agreed social outcome targets being achieved. The procurement agency pay investor’s Capital is another word for money. It refers to financial capital or money and in particular the amount of cash and other assets held by an organisation., plus interest, as the social outcomes will be benefiting society.