Specialist property tax accountants since 2003
Optimise Accountants (OPTIMISE ACCOUNTANTS LIMITED, company number 04856185) has specialised in UK property tax since 2003. We work only with landlords, property investors, property companies and developers. Our work covers rental income tax returns, property company accounts, Stamp Duty Land Tax, Capital Gains Tax, Inheritance Tax planning for property portfolios and Making Tax Digital.
Every client works with a named ACCA-qualified account manager, never a junior or part-qualified accountant, and can book calls directly within 5 working days. Self Assessment support starts from £29.95 a month and limited company support from £49.95 a month, including VAT.
About our founder: Simon Misiewicz FCCA, ATT, MBA
Simon leads a team of five ACCA-qualified accountants. He is a Fellow of ACCA and a member of the Association of Taxation Technicians, holds an MBA, and has invested in property himself since 2006.
Why landlords are paying more tax
Section 24 means landlords who own property personally get only a 20% tax reduction for mortgage interest, rising to 22% from 6 April 2027 in England, Wales and Northern Ireland. In England and Northern Ireland, buying an additional home also adds 5% to every Stamp Duty band.
UK Property Tax Accountants for Landlords & Property Companies
- Tax returns: Self Assessment and Making Tax Digital (mandatory since April 2026 if your 2024/25 qualifying income was over £50,000).
- Capital Gains Tax: residential gains are taxed at 18% and 24% (since 6 April 2024), and you report and pay within 60 days of completion where tax is due.
- Other taxes: Stamp Duty planning, Inheritance Tax planning for property portfolios, and Corporation Tax for property companies.
Published work and media
- Property118 – author of four articles (2025): MTD: how to avoid or exit the regime, MTD software for landlords, leaving the UK as a landlord and MTD is edging closer; interviewed on Making Tax Digital (2025) and quoted in its Making Tax Digital coverage (2026)
- Insider Media – quoted on Making Tax Digital
- Secret Property Club – interview, “The Cost of Getting It Wrong” (2026)
- Landlord Today and Property Reporter – author, passing a buy-to-let to children tax-efficiently (2019)
- The Telegraph – quoted on buy-to-let tax (2015)
- Podcasts – host of the UK Property Tax Show; guest on Property Solvers, Business Debt Doctor and Inside Property Investing
- Author of UK tax planning eBooks (Amazon)
Simon also answers landlord tax questions on Reddit, Quora and LandlordZone.
How we work
Every client has a named, qualified account manager, a fixed monthly fee that includes tax calls, and access to our client portal for records and documents. We work with landlords and property companies across the UK by phone and video call, and support complex cases including HMOs, serviced accommodation and commercial property.
Property tax expertise that delivers results
For more than 20 years we have focused on property tax for landlords and property companies, including HMOs, serviced accommodation and commercial property. Book a consultation to review your structure and plans.
