Knowledge Hub
Authoritative guides on HMRC late filing penalties, Self Assessment obligations, and specialist tax advice. Every article reviewed by a qualified, practising accountant.
Penalties & Deadlines
You just missed a deadline or got your first fine. Here's exactly what HMRC charges and when.
The HMRC Penalty Escalator: Exactly What You Owe for a Late Self Assessment
A brutal, clear breakdown of every HMRC late Self Assessment penalty — from the £100 automatic fine on day one through to 12-month surcharges and enforcement risk. Know exactly what you owe right now.
Missed the Corporation Tax Deadline? Company Penalties Explained
A late company tax return triggers a double-whammy: HMRC penalties on your CT600 and Companies House fines on your accounts. Ignore both long enough and your company gets struck off. Here is the full picture.
Appeals & Excuses
You're late but want to fight the penalty. Here's what qualifies, what doesn't, and how to appeal.
Years Behind
You haven't filed in years. Here's how to come forward voluntarily — and what happens if you don't.
Years Behind on Your Tax Returns? Here's How to Come Clean to HMRC
If you haven't filed for three, five, or ten years, the most important thing to know is this: coming forward voluntarily always results in significantly lower penalties than being discovered. Here's the practical path forward — including HMRC's disclosure campaigns for landlords.
What Happens When HMRC Sends a Debt Collection Agency?
If HMRC has passed your debt to a collection agency — or if you've had a "field force" visit — here's exactly what they can and cannot do, and how a Time to Pay arrangement with HMRC stops the process cold.
The Multi-Year Tax Arrears Roadmap: Catching Up on Years of Unfiled Returns
Three, five, ten years of unfiled returns. The maths is fixable, the penalty position is reducible, and the route through is structured. The wrong move is staying silent and hoping HMRC does not notice.
Who We Help
Guides for specific situations — landlords, contractors, directors, self-employed professionals.
Self-Employed Tax Recovery: Professional Help for Sole Trader Arrears
Sole trader tax arrears compound across years quietly. The recovery process is mechanical once the framework is in place: reconstruct, claim everything legitimately deductible, disclose, settle.
The Director's Guide to Corporate Tax Compliance and Late Filing
Late corporation tax compounds in two directions: the company's exposure and the director's personal exposure. Both are recoverable but the timing of action matters more than the underlying numbers.
The Landlord's Tax Amnesty: Solving Late Property Income Disclosures
UK landlords with undisclosed rental income have a specific and beneficial disclosure route: the Let Property Campaign. Combined with the right approach to expenses, allowances, and CGT timing, the catch-up is materially less painful than most landlords expect.
CIS Tax Recovery: Helping Contractors with Late CIS Filings
CIS arrears compound through both monthly returns and annual Self Assessment. The recovery framework is well-defined; getting it right matters because gross payment status is a 30% margin issue.
Crypto Tax Disclosure: How to Report Late Bitcoin and NFT Gains
Crypto investors who have not declared gains are running out of time to come forward voluntarily. HMRC now receives data from exchanges; the disclosure window is the lower-cost route compared to waiting for the prompt.
Expat and International Tax Recovery: Non-Resident Compliance Guide
UK tax obligations do not stop at the border. Expats with undisclosed UK income, returners with foreign income, and digital nomads working remotely all face specific frameworks. The catch-up is mechanical once the residence position is established.
Deadlines & Process
Deadlines, reference guides, and step-by-step compliance checklists.
Surviving an HMRC Investigation: Professional Defence Strategies
An HMRC compliance check or investigation feels existential. It is not. The framework is structured, the inspector's powers have specific limits, and the right response strategy materially changes the outcome.
Making Tax Digital for Late Filers: Future-Proofing Your Business
MTD ITSA went live for the £50,000+ cohort in April 2026. For late filers catching up on arrears, MTD adds a future-state compliance layer that needs to be planned alongside the historic catch-up.
Ready to Sort Your Late Tax Returns?
Reading the guides is a good start. Speaking to a specialist is a better one. Free assessment — no obligation.