Richard Price built the Northampton mortality table and Observations on Reversionary Payments (1771), the standard actuarial reference for roughly a century

Richard Price (1723–1791), a Welsh dissenting minister, moral philosopher, and mathematician, produced the Northampton mortality table and the treatise Observations on Reversionary Payments (1771), which became the standard reference for pricing life assurance and annuities in Britain for roughly a century. The work supplied "the basis for financial calculations of insurance and benefit societies," and Price advised the Society for Equitable Assurances on Lives and Survivorship (Equitable Life) from about 1766.

Price's table succeeded the actuarial infrastructure laid down by James Dodson's age-scaled premiums, which in turn built on Edmond Halley's 1693 Breslau life table. Where Dodson had designed the pricing method that let Equitable rate each life by age — after being refused by the age-blind Amicable Society — Price furnished the empirical mortality data those methods ran on, and codified the reversionary-payment mathematics in a single reference text. The Northampton table thus sits one generation downstream of Dodson and Halley in the same lineage that carried actuarial science from astronomer's curiosity to institutional standard.

The same Richard Price is, unexpectedly, a load-bearing figure in a second and wholly separate lineage — the founding debate of modern political philosophy (see claim-price-1789-sermon-provoked-burke-reflections and the bridge in observation-richard-price-anchors-actuarial-and-political-philosophy-lineages). A known directional bias in this very table — that it overestimated mortality — is treated separately in claim-price-northampton-table-overestimated-mortality-favouring-insurers.

Addendum (2026-07-25). Northampton's status as the standard reference outlasted the first data capable of testing it: the Amicable Society's own assured-lives mortality experience of about 1811 came out more favourable than Northampton, and a fuller analysis of the same records followed in 1841, yet the table remained the standard for roughly a century.