Value-added tax (VAT) is self-assessed, which means the responsibility for accuracy sits entirely with your business, whether or not errors are accidental or because of your chosen tax system. A variety of factors can unintentionally alter your VAT exposure, including changes in turnover, property transactions, or the introduction of new digital systems. And businesses that operate in partially exempt sectors or deal with mixed supplies are acutely vulnerable to miscalculations. This has all come at a time when HMRC scrutiny and penalties have increased, making proactive reviews a far more cost-effective alternative to reactive corrections. Structured reviews provide reassurance that your VAT treatment reflects current legislation and commercial reality.