Thellusson v Woodford (1799) 4 Ves 227 is an English trusts law case.

Peter Thellusson directed the income of his property, consisting of real estate of the annual value of about £5,000 and personal estate amounting to over £600,000, to be accumulated during the lives of his children, grandchildren and great-grandchildren, living at the time of his death, and the survivor of them.

Owing, however, to the heavy expenses, the amount inherited was not much larger than that originally bequeathed.

[1] To prevent such a disposition of property in the future, the Accumulations Act 1800 (known also as the "Thellusson Act") was passed, by which it was enacted that no property should be accumulated for any longer term than either The Act, however, did not extend to any provision for payment of the debts of the grantor or of any other person, to any provision for raising portions for the children of the settlor, to any person interested under the settlement or any direction touching the produce of timber or wood upon any lands or tenements.

The Act was further amended by the Accumulations Act 1892, which forbids accumulations for the purpose of the purchase of land for any longer period than during the minority of any person or persons who, if of full age, would be entitled to receive the income.