To allow for more transparency and scrutiny, documents and consultations that would traditionally be published at a Budget will be published on 23 March.
This will ensure tax professionals will have a better opportunity to feed into consultations and policy discussions, which will strengthen policy-making.
None of the announcements will require legislation in the next Finance Bill or have an impact on the government's finances.
Several consultations are an important part of the government's 10-year tax administration strategy to create a tax system fit for the challenges and opportunities of the 21st century.
Financial Secretary to the Treasury Jesse Norman said:
"We are making these announcements separately to the Budget, but still all on a single day, in order to give a range of important but less high profile measures greater visibility among Members of Parliament, tax professionals and other stakeholders, and greater scope for scrutiny by them."
Announcements which have implications to the government's finances, that need to be captured in the OBR's economic and fiscal outlook, and announcements of measures to be legislated in the Finance Bill, will be made on Budget day in the normal way.
