In legal practice, depreciation reserve usually describes either: (1) the accumulated depreciation recorded in a company’s accounts, reducing the carrying value of fixed assets; or (2) a contractually created reserve fund to finance the repair or replacement of wasting assets (for example, plant, machinery or building components).The term is not defined in company legislation; in accounting under UK/Irish GAAP (FRS 102) the balance is presented as accumulated depreciation, a contra‑asset. It represents a non‑cash charge that reduces reported profits and net assets relevant to the Companies Act 2006 (England & Wales and Northern Ireland) and the Companies Act 2014 (Ireland) distribution tests. It is not a distributable reserve and does not, of itself, create a pot of cash. For tax, depreciation is generally added back; relief is via capital allowances.In leases, PFI/PPP and facilities/asset management agreements, depreciation reserve often denotes a ring‑fenced cash fund for lifecycle or replacement costs. Its creation, permitted uses, control, interest, audit and handover on termination are drafting points. In residential and mixed‑use schemes, analogous “reserve” or “sinking” funds are subject to statutory controls and reasonableness requirements (including trust/segregation rules where applicable). Usage is broadly consistent across England & Wales, Scotland, Northern Ireland and Ireland, though detailed regulation varies by sector and statute.