MCP server

TapTax Official

uk.co.taptax/taptax

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

UK tax: take-home pay, self-employed and company tax, VAT, stamp duty, invoices and MTD.

Website Source

At a glance

Type

MCP server

Publisher

taptax.co.uk (verified by the MCP Registry)

Status

Working at last check

Tools

49

Token cost

About 14,403 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http taptax https://api.taptax.co.uk/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.taptax]
url = "https://api.taptax.co.uk/mcp"

Gemini CLI

{"mcpServers":{"taptax":{"httpUrl":"https://api.taptax.co.uk/mcp"}}}

Cursor

{"mcpServers":{"taptax":{"url":"https://api.taptax.co.uk/mcp"}}}

VS Code

{"servers":{"taptax":{"type":"http","url":"https://api.taptax.co.uk/mcp"}}}

Antigravity

agy mcp add taptax https://api.taptax.co.uk/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"taptax","server_url":"https://api.taptax.co.uk/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"taptax","server_url":"https://api.taptax.co.uk/mcp"}

Tools

• add_transaction ~865 tokens
  Record a business income or expense in the signed-in person's TapTax, such as a receipt or a payment. The category is the HMRC self-employment box it belongs in. The same entry added twice within 10 minutes is recorded once.
• calculate_capital_gains_tax ~422 tokens
  Calculate UK Capital Gains Tax on selling an asset (residential property, shares, a business qualifying for Business Asset Disposal Relief, or other assets) for a tax year: the gain after costs, losses and the annual exempt amount, tax at each rate given other income, and the payment deadline.
• calculate_child_benefit_charge Moves money · ~231 tokens
  Calculate the High Income Child Benefit Charge on an adjusted net income and the Child Benefit received in a tax year: the charge, the benefit kept, and the income the charge starts from.
• calculate_cis_deduction ~353 tokens
  Calculate the Construction Industry Scheme deduction on a payment (labour only, materials excluded) at the registered, unregistered or gross-payment rate, the amount received, and whether the year's deductions are likely to be more or less than the tax actually due.
• calculate_contractor_day_rate ~334 tokens
  Turn a contractor day rate into annual and monthly income, an hourly equivalent, and take-home pay as a sole trader, through a company outside IR35 and inside IR35, with the best route and the PAYE salary that would take home as much, for a tax year.
• calculate_corporation_tax ~183 tokens
  Calculate UK corporation tax on a company's taxable profit for a tax year, including marginal relief between the small profits and main rates, with profit after tax and the effective rate.
• calculate_dividend_tax ~214 tokens
  Calculate UK tax on dividends for a tax year, given the dividends and other income: the dividend allowance, tax at the basic, higher and additional dividend rates, and the effective rate.
• calculate_gross_salary_for_take_home ~303 tokens
  Work out the gross UK salary needed to take home a given amount a year after income tax, employee National Insurance, student loan and a pension percentage, for a tax year (net to gross).
• calculate_invoice_due_date ~305 tokens
  Calculate the date an invoice is due from its date and the payment terms (on receipt, a number of days, end of month, days after month end, a day of the following month, or the statutory 30-day default), with the weekday and whether the terms exceed the statutory limit.
• calculate_late_payment_interest ~226 tokens
  Calculate the statutory interest (Bank of England base rate plus 8%) and fixed compensation a business can claim on a late-paid commercial invoice under the Late Payment of Commercial Debts Act, from the amount, the due date and the payment date.
• calculate_markup ~143 tokens
  Calculate the selling price, profit and the equivalent profit margin from a cost and a markup percentage.
• calculate_mileage_allowance ~271 tokens
  Calculate the tax-free business mileage allowance for a year at HMRC's approved mileage rates for a car or van, motorcycle or bicycle, including the passenger rate, and the tax it saves at the basic or higher rate.
• calculate_pension_tax_relief ~315 tokens
  Compare a self-employed person's tax with their current and a higher personal pension contribution in a tax year: the basic-rate relief added to the pension, the reduction in the tax bill, and the net cost of the extra contribution.
• calculate_pro_rata_salary ~340 tokens
  Work out a part-time salary from the full-time salary and the hours or days worked compared with full time, with the take-home pay on the pro rata salary for a tax year.
• calculate_profit_margin ~173 tokens
  Calculate the profit margin and markup from a cost and a selling price, or the selling price needed for a target margin.
• calculate_rental_income_tax ~270 tokens
  Calculate UK income tax on rental profit for a landlord in a tax year, given rent, allowable expenses, mortgage interest (relieved as a 20% tax credit) and other income.
• calculate_salary_sacrifice ~469 tokens
  Compare pay before and after a salary sacrifice for a pension or an electric company car: income tax, National Insurance and student loan saved, employer National Insurance saved and passed back, benefit-in-kind tax for a car, the drop in take-home pay, and for a pension the cost per pound added and
• calculate_savings_interest_tax ~248 tokens
  Calculate UK tax on savings interest for a tax year, given the interest, any tax already deducted and other income: the starting rate for savings, the Personal Savings Allowance and the tax due.
• calculate_stamp_duty ~368 tokens
  Calculate the tax on buying property: Stamp Duty Land Tax in England and Northern Ireland, Land and Buildings Transaction Tax in Scotland or Land Transaction Tax in Wales, by band, with first-time buyer relief, the additional property surcharge and the non-resident surcharge where they apply.
• calculate_student_loan_repayment ~206 tokens
  Calculate yearly, monthly and weekly UK student loan repayments on an income for a repayment plan (Plan 1, 2, 4 or the postgraduate loan) in a tax year.
• calculate_take_home_pay Moves money · ~335 tokens
  Calculate take-home pay from a UK salary for a tax year: income tax by band (England, Wales and Northern Ireland, or Scotland), employee National Insurance, student loan repayment and pension contributions, with yearly, monthly and weekly take-home and the employer National Insurance and total cost
• calculate_tax_on_multiple_incomes ~432 tokens
  Calculate the combined UK tax on income from several sources in one tax year (employment, self-employment, rental profit, dividends and savings interest), allowing for PAYE tax already deducted: income tax, National Insurance, student loan, what is left to pay and take-home.
• calculate_vat ~187 tokens
  Add VAT to a net price or take it out of a gross price at the standard (20%), reduced (5%) or any other rate, with the net, VAT and gross amounts.
• check_mtd_status ~169 tokens
  Say whether and when Making Tax Digital for Income Tax applies to someone, from their qualifying income: self-employment turnover plus property income, before expenses, as on their Self Assessment return. Employment and pension income do not count.
• check_tax_code ~435 tokens
  Check whether a UK PAYE tax code (e.g. 1257L, BR, K475, 1257L W1/M1) looks right for a salary and circumstances, explain what it means, and estimate any over- or under-payment. Flat-rate codes (BR, D0, D1) are only judged when hasMultipleJobs is known; without it the verdict is needs_info. Returns a
• check_vat_registration ~293 tokens
  Check whether a turnover is over the UK VAT registration threshold for a tax year, and compare VAT payable under the standard scheme with the Flat Rate Scheme for the business's sector rate, including the first-year discount, with the cheaper scheme and the difference.
• check_vat_reverse_charge Moves money · ~235 tokens
  Work out whether the domestic VAT reverse charge for construction services applies to an invoice, by HMRC's decision steps. Takes the yes or no answers known so far and returns the next question to answer, or the outcome with what the invoice must say.
• compare_inside_and_outside_ir35 ~294 tokens
  Compare a contractor's take-home pay working inside IR35 (deemed employment payment, employer National Insurance) with working outside IR35 through a limited company, from the day rate and working days, for a tax year. It compares pay; it does not decide IR35 status.
• compare_limited_company_and_sole_trader ~237 tokens
  Compare take-home pay as a sole trader with running the same profit through a limited company (salary plus dividends, corporation tax and accountancy cost) for a tax year, with the annual difference and an approximate break-even profit.
• compare_salary_and_dividends ~237 tokens
  For a limited company director, work out take-home pay from a chosen salary plus dividends paid from the remaining profit after employer National Insurance and corporation tax, with every tax and the effective rate, for a tax year.
• convert_hourly_rate_to_salary ~322 tokens
  Convert an hourly rate to the annual salary it adds up to for the hours a week and paid weeks a year given, with take-home pay on that salary for a tax year.
• convert_salary_to_hourly_rate ~315 tokens
  Convert an annual salary to its gross hourly rate and the take-home pay per hour, for the hours a week and paid weeks a year given, in a tax year.
• create_invoice Moves money · ~518 tokens
  Create and save a draft invoice in the signed-in person's TapTax account from a client name and one or more line items. No saved client, earlier invoice or client email is needed to create it; an email is only needed later, to send it. It is numbered in their sequence, uses their saved business deta
• estimate_self_assessment_penalties ~259 tokens
  Estimate Self Assessment late filing penalties, late payment penalties and late payment interest on the tax due, from how many days late the return was filed and the tax was paid.
• estimate_self_employed_tax ~469 tokens
  Estimate UK income tax and Class 4 National Insurance for a sole trader from turnover and allowable expenses, with the take-home figure, effective and marginal rates, payments on account and tailored tips, from HMRC's published rates for the tax year. Works from the figures given, without a TapTax a
• generate_invoice_numbers ~292 tokens
  Generate invoice numbers: the next number after a given one (keeping its prefix and zero padding), or a run of numbers in a chosen format (prefix, separator, optional year or month, number of digits) from a starting number.
• get_mileage_summary ~111 tokens
  Read the signed-in person's own mileage log in their TapTax account for a tax year: total miles, the deductible amount at the approved rates, and the most recent trips.
• get_mtd_deadlines ~120 tokens
  List the standard Making Tax Digital quarterly update periods and deadlines for a tax year, and which one is next. Updates are cumulative from 6 April.
• get_tax_position ~196 tokens
  Read the signed-in person's own TapTax account: their tax year so far, as their dashboard shows it: business income, expenses and profit counted by the filing rule, the estimated income tax and Class 4 NI, how many transactions still need a business-or-personal decision, which quarterly updates they
• list_invoices ~168 tokens
  Read the signed-in person's own invoices from their TapTax account, newest first, with each one's live status (a sent invoice past its due date reads as overdue) and the totals outstanding and overdue. Needs no details from the person.
• list_transactions ~286 tokens
  Read and search the signed-in person's own income and expense records in their TapTax account, newest first. Filter by tax year or dates, type, text in the description, or needsReview=true for the ones still waiting for a business-or-personal decision (the review queue). Needs no details from the pe
• log_mileage_trip ~259 tokens
  Record a business journey in the signed-in person's mileage log. TapTax prices it at the approved mileage rate for the tax year (tiered after 10,000 car miles). Commuting to a permanent workplace is not business mileage. Mileage tracking is on the Pro plan.
• mark_invoice_paid ~139 tokens
  Record that the client has paid an invoice (dated today). Stops any payment reminders.
• plan_quarterly_tax_set_aside ~313 tokens
  Plan how much to set aside for tax as a sole trader under Making Tax Digital, from the year's profit or each quarter's profit: the income tax, Class 4 National Insurance and student loan due, monthly and weekly amounts to put away, running totals by quarter with each update deadline, and any first p
• prepare_business_document ~615 tokens
  Prepare an invoice, quote, receipt, credit note or pro forma invoice in TapTax's free document generator, without a TapTax account. Returns the totals and a link that opens the generator with the document filled in, where the person checks it, adds a logo if they like, and downloads the PDF. The det
• prepare_quarterly_update ~226 tokens
  Get the signed-in person's Making Tax Digital quarterly update ready: the cumulative income, expenses and profit from 6 April to the end of the quarter, what still needs reviewing, and a card with a button that opens TapTax to check and file it. Filing itself always happens in the TapTax app, never
• send_invoice Sends messages · ~202 tokens
  Get one of the signed-in person’s invoices ready to email, with its PDF, to the client address on it from their business name. It opens a card showing exactly what the client will receive (who it goes to, the lines and the total) with a Send button. Nothing is emailed until the person presses Send o
• send_invoice_from_card Sends messages · ~179 tokens
  Emails the invoice shown on a TapTax send card to its client, when the person presses Send on that card. Needs the one-time token the card was given.
• update_transaction ~321 tokens
  Change a transaction the signed-in person owns: mark it business or personal (this is how the review queue is cleared), or correct its category, description, amount or date.

Browse

• Payments
• Invoicing and accounting

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