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Back Tax Calculation in Bexley

If you have unfiled years at a DA1 to DA18 address, the actual tax position is often a refund rather than a bill, because CIS deductions taken at source by contractors (20% on verified subcontractors) are usually higher than the actual tax due after allowable expenses.

We match you with vetted, HMRC-registered Bexley-experienced accountants who produce a clean year-by-year liability schedule (CIS deductions credited per year, Section 24 fractions for landlord cases, all reliefs identified) so you know exactly the position before deciding next steps.

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Bexley-Specific Back-Tax Items

CIS deductions as tax credits per year
HMRC holds the CIS deduction record for every contractor you worked for. Multi-year accumulated deductions often exceed actual tax due once allowable expenses are applied.
Section 24 fractions per year
Multi-year BTL cases spanning 2017-2020 need correct fraction per year (75/25, 50/50, 25/75, 0/100). Post-2022 Elizabeth Line corridor BTL acquisitions are squarely in the 100% credit regime.
Allowable business expenses
Van (capital allowances or simplified mileage), tools, work clothing, PPE, training, public liability insurance, accountancy fees, business proportion of mobile phone.
Mixed PAYE / self-employed reconciliation
For Bexley logistics workers with mixed bases, RTI captures the PAYE side; self-employed income calculated separately per year.

CIS Refund Position Calculation

For Bexley CIS subcontractors, the back-tax calculation per year:

  1. 1
    Gross income reconstructed
    From bank deposits (net of CIS) plus contractor pay summaries.
  2. 2
    Allowable expenses applied
    Van, tools, work clothing, training, insurance, accountancy fees.
  3. 3
    Net trading profit calculated
    Personal allowance applied; tax due calculated at the appropriate band.
  4. 4
    CIS deductions credited
    HMRC-held CIS data applied as tax already paid for that year.
  5. 5
    Refund or balancing payment per year
    For most Bexley CIS cases with consistent allowable expenses, the calculation produces a refund.

Elizabeth Line BTL Back-Tax

For Elizabeth Line corridor (Abbey Wood, Belvedere, Slade Green, Plumstead) BTL landlords with unfiled years post-2022, Section 24 is fully bedded in (100% credit only). The back-tax calculation includes: gross rental income, allowable expenses (agent fees, repairs, insurance, mortgage interest as 20% credit, ground rent), capital allowances on furniture / replacements where applicable, capital gains on any disposal completed within the unfiled period (60-day standalone CGT return for residential disposals).

Bexley back tax calculation: Common Questions

Frequently Asked Questions

HMRC holds the authoritative CIS deduction record reported by every contractor. The matched accountant requests this under 64-8; the figures are HMRC-verified by definition. Bank deposits provide the corresponding net-of-CIS income side; reconciliation is straightforward.

Get Your Bexley Back-Tax Calculation

Free initial consultation. The matched accountant produces a year-by-year liability schedule with CIS deductions and reliefs correctly applied per year. Often a refund. Response within 2 business hours.

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