Accounting

Capital Gains Tax · South West London

Capital gains tax returns in Mortlake

Selling a rental property in Mortlake starts a 60-day clock to report the gain and pay the tax, separately from your annual return. We calculate the gain with every allowable cost and relief, file the return through HMRC's service and tell you exactly what to pay. Shares, funds and business assets are handled the same way, for a fixed fee.

from £149 · fixed, per report

Next deadlines

  • UK residential property disposals: CGT return and payment within 60 days of completion
  • UK residential property disposals: CGT return and payment within 60 days of completion
  • Online Self Assessment filing deadline and balancing payment due
  • UK residential property disposals: CGT return and payment within 60 days of completion

Who this is for

Capital Gains Tax for Mortlake

Individuals and trustees in Mortlake disposing of assets: landlords selling a rental or a former home, investors selling shares or funds outside an ISA, employees exercising options or selling scheme shares, business owners selling a company or its assets, people gifting assets to family, and executors dealing with disposals during an estate administration.

What is included

Everything inside the fixed fee

  • Gain computed for each disposal with acquisition cost, enhancement expenditure and incidental costs allowed in full
  • 60-day UK residential property return filed through HMRC's online service with the tax paid on account
  • Private residence relief, lettings relief and periods of absence calculated for homes that were once let or vacant
  • Share and fund disposals matched under the same-day, 30-day and section 104 pooling rules
  • Business asset disposal relief, investors' relief, gift relief and rollover relief claimed where available
  • Losses identified and claimed, annual exempt amount and rate bands applied, Self Assessment pages completed

How it works

Capital Gains Tax from Mortlake, step by step

  1. Scope the job

    We find out what you need filed, when it is due and what state the records are in, and tell you which fixed-fee package applies.

  2. Agree the price

    The fee is confirmed in writing. There is no hourly billing and nothing added for questions during the work.

  3. Hand over the records

    Photographs, PDFs, software access or a spreadsheet, sent however suits you. We confirm what we have and what is missing within two working days.

  4. Approve, then we submit

    You review the draft with our explanation, sign off, and we file. Receipts, copies and the next deadlines come back to you immediately.

Why IGI

The IGI way of working, in Mortlake

The price for capital gains tax is published on this page and is what a client in Mortlake pays. We confirm it in writing first, and the invoice matches the quote.

Nothing for Mortlake is left to the last week. Each deadline relevant to capital gains tax is tracked from the day you join, with the next four shown on every page we send you.

No appointments, no travel across South West London, no parking. Everything for capital gains tax in Mortlake happens online, with a real person on the other end during UK working hours.

A named person handles your capital gains tax from Mortlake and knows the file, so you are not re-explaining your business to a different helpdesk each time.

The output for Mortlake clients is never just a form. It is the form, a one-page summary of what it says, and a note of the decisions it points to for capital gains tax.

Nothing is filed for Mortlake until you have reviewed and approved it. You see the draft, you ask questions, you sign off, then we submit and send you the receipt.

Local facts

About Mortlake

Mortlake is in South West London, within Richmond upon Thames, in the SW14 postcode district, England. For businesses in England the tax rules are those set by the UK Parliament: the 20/40/45% income tax bands, Class 4 National Insurance for the self-employed at 6% and 2%, Corporation Tax at 19% to 25%, and Stamp Duty Land Tax on property. Business rates are set locally by the council.

Nearby places we also serve for capital gains tax
PlaceDistanceDirection
East Sheen0.5 miS
Mortlake and Barnes Common0.8 miE
North Sheen0.8 miW
Barnes0.9 miE
Kew0.9 miNW
Chiswick Riverside0.9 miN
Kew Green1 miNW
Chiswick Homefields1 miNE

Worth knowing

Rules that come up in this work

CIS deductions

Under the Construction Industry Scheme, contractors deduct 20% from a registered subcontractor's labour invoices, or 30% if unregistered, and pay it to HMRC. The subcontractor reclaims the deductions against their actual tax through Self Assessment, usually producing a refund because deductions are on turnover while tax is on profit. Contractors file a monthly return by the 19th.

Confirmation statements and identity verification

Companies House has tightened its requirements under the Economic Crime and Corporate Transparency Act: every company needs a registered email address and an appropriate registered office, every statement includes a lawful-purpose declaration, and every director and PSC must verify their identity. The confirmation statement, due annually with a £50 fee, is where most of this is confirmed.

Corporation Tax rates and marginal relief

Companies pay Corporation Tax at 19% on profits up to £50,000 and 25% on profits over £250,000. Between those figures marginal relief applies, producing an effective rate that rises gradually and a marginal rate of 26.5% on each pound in the band. The thresholds are divided by the number of associated companies, so a director with two companies has thresholds of £25,000 and £125,000 for each.

The VAT registration threshold

VAT registration is compulsory once taxable turnover in any rolling twelve-month period exceeds £90,000, or when you expect to exceed that in the next thirty days alone. The test is rolling, not by tax year, and includes zero-rated sales. Businesses regularly cross it without noticing, and late registration means accounting for VAT on sales where it was never charged to customers.

Director's loan accounts

A director's loan account records money moving between a director and the company that is not salary or dividend. If the director owes the company money nine months and one day after the year end, the company pays section 455 tax at 35.75% of the balance, refundable only when the loan is repaid. Loans over £10,000 are also a benefit in kind unless interest is charged at HMRC's official rate.

Salary versus dividends

Paying yourself from a company involves two routes with different tax treatment. Salary through payroll is a company expense and builds a National Insurance record; dividends come from post-tax profit at lower personal rates. Undocumented drawings that are neither become director's loans, with a 35.75% section 455 charge if not repaid within nine months of the year end.

Payments on account

If your Self Assessment bill exceeds £1,000 and less than 80% of your tax was collected at source, HMRC asks for two advance payments towards the following year, each half of the current bill, due 31 January and 31 July. The first year this happens the January payment is effectively one and a half times the bill. We model it in advance and show you how to reduce the payments if income is falling.

Questions

Capital Gains Tax questions from Mortlake

I am an executor. Do I report gains for the estate?

Yes. During the administration period the estate is a separate taxpayer with its own annual exemption and pays CGT at 24% on gains above probate value. Residential property sales by the estate are subject to the 60-day rule. We prepare the estate computations and the trust and estate return pages.

I am not UK resident but sold a UK property. Do I need to report?

Yes. Non-residents must report all UK land and property disposals within 60 days, whether or not tax is due, and residential property gains are generally rebased to April 2015 values. The rules differ from those for residents and the penalties for not reporting are the same. We handle non-resident returns regularly.

What costs can I deduct from the gain?

The purchase price, stamp duty and legal fees on purchase, capital improvements that are still reflected in the asset at sale (extensions, new kitchens, not repairs), and selling costs including agent and legal fees. For shares, dealing costs and stamp duty. For inherited assets, the probate value is the cost.

I sold my former home that I later let out. Is it all taxable?

No. Private residence relief exempts the gain for the period you lived there plus the final nine months of ownership, and certain periods of absence can qualify. The let period is taxable. Lettings relief now applies only where you shared occupation with the tenant. We apportion the gain by days and claim every qualifying period.

What is the 60-day property return?

When a UK resident sells UK residential property and tax is due, they must file a return through HMRC's Capital Gains Tax on UK property service and pay the tax within 60 days of completion. This is separate from and in addition to the annual Self Assessment. Late filing penalties mirror Self Assessment: £100 immediately, then daily and tax-geared penalties.

What are the Capital Gains Tax rates for 2026/27?

The annual exempt amount is £3,000. Gains above it are taxed at 18% to the extent they fall within your unused basic rate band and 24% above it, for all asset types including residential property. Gains qualifying for business asset disposal relief are taxed at 14% in 2025/26, rising to 18% from April 2026, on up to £1 million of lifetime gains.

How do I get started from Mortlake?

Message us on WhatsApp or email with a sentence about your business and what you need. We reply in working hours with any questions and a fixed fee for capital gains tax. Once you confirm, we tell you exactly which records to send and the work begins. Most Mortlake clients are set up within a day.

Which deadlines matter most for capital gains tax?

The next four dates that apply to capital gains tax are shown at the top of this page, calculated from today. For Mortlake clients we diarise every one of them from the day you join and send reminders before each, so the work is done in good time rather than in the last week before a penalty.

Get a fixed quote for Mortlake today

Tell us what you need. You get one fixed fee in writing, and nothing is filed until you approve it.

WhatsApp for a fixed quote