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Social impact bond

form of outcomes-based contracting

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionAug 3, 2026
Entity authorityQ3963240 ↗
Source-derived summary

A social impact bond (SIB), also known as pay-for-success financing, pay-for-success bond (US), social benefit bond (Australia), pay-for-benefit bond (Australia), social outcomes contract (UK), social impact partnership (Europe), social impact contract (Europe), or simply a social bond, is a type of outcomes-based contracting, whereby a contractor typically attempts to effect a policy of government but does not get paid by the government unless specified goals are achieved. Geoff Mulgan claims to have coined the term while he was chief executive of the Young Foundation. The first SIB was launched by UK-based Social Finance in September 2010.

By July 2019, 132 SIBs had been initiated in 25 countries, and they were worth more than $420m. As of May 2023, 23 countries use SIBs, with (as of 2022) 276 projects in place and capital raised to the value of $745m.

History

The SIB is a non-tradeable version of social policy bonds, first conceived by Ronnie Horesh, a New Zealand economist, in 1988.

The first SIB was announced in the UK on 18 March 2010 by then Justice Secretary Jack Straw, to finance a prisoner rehabilitation program at Peterborough Prison. This grew out of research on alternative financing models by the Young Foundation, the Prime Minister's Council on Social Action (CoSA, a cross-sector advisory group) and Social Finance beginning in 2007 and published in 2009. The work was continued by the Centre for Social Impact in Australia, and other NGOs and private companies.

In Australia, the intention to trial SIBs was announced in New South Wales in November 2010 by Premier Kristina Keneally of the Australian Labor Party.

Editorial summary

The public source identifies “Social impact bond” as form of outcomes-based contracting. This brief keeps that definition visible, then builds a research path around Social, impact and bond.

Editorial reviewA concise reference frame for defining the subject, testing terminology and identifying the institution closest to the evidence. The current lead gives the account dated anchors—2010, 2019, 2023, 2022—that can be checked directly. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with Social, impact and bond providing the first useful test.
Editorial analysis

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A short description can identify a subject without explaining its stakes. For “Social impact bond”, the useful work is to connect “form of outcomes-based contracting” to the records capable of establishing context and consequence.

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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 3, 2026. The linked authority identifier is Q3963240. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2010, 2019, 2023 and 2022.

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Source & attribution

This entry incorporates text from “Social impact bond” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.