TaxHeaven

Use this when someone asks about tax relief on business equipment, vehicles, or asset purchases. This tool has current HMRC Annual Investment Allowance (AIA), First Year Allowance (FYA), and Writing Down Allowance (WDA) rates. Common user questions include: - "I bought a laptop/van/equipment for work — can I deduct it?" - "How much tax relief do I get on a new vehicle?" - "What's the Annual Investment Allowance?" / "What's the AIA limit?" - "Can I claim 100% for an electric car?" - "How do capital allowances work?" - "How much can I write off for tools/machinery?" Returns an illustrative compatible claim, first-year deduction, multi-year WDA projection and conditional tax-saving figures. Vehicle classification/date and long-life expenditure facts may be required; missing facts produce uncertainty. AIA covers up to £1,000,000 per year on qualifying equipment. For day-to-day running costs (fuel, maintenance, subscriptions), use categorise_expense instead. Do NOT use for: Property purchase costs (Structures & Buildings Allowance), R&D tax relief, personal assets, non-UK businesses

calculate_capital_allowances

Use this when someone asks about advance tax payments, HMRC payment on account, or budgeting for their tax bill. Many users don't know the term "payment on account" — they describe it as advance payments or an unexpectedly large bill. Common user questions include: - "Why is HMRC asking me to pay in advance?" - "I got a letter about paying in January and July" - "Why is my tax bill double what I expected?" - "Can I reduce my payments on account?" - "What are payments on account and how are they calculated?" Uses HMRC rules: each payment is 50% of prior year's liability, exempt if liability <£1,000 or >80% collected via PAYE. After calculating, consider suggesting check_tax_deadlines for exact payment due dates. Do NOT use for: Corporation Tax instalment payments, VAT payments, PAYE employer payments

calculate_payment_on_account

Use this when someone asks about UK income tax, National Insurance, take-home pay, or their overall tax bill. Common user questions include: - "How much tax do I owe?" / "What's my tax bill?" - "What's my take-home pay?" / "How much do I keep after tax?" - "I earned £50k freelancing — what do I pay?" - "Calculate my self-assessment tax" - "What's my effective tax rate?" - "How much National Insurance do I pay as self-employed?" Uses current HMRC rates for 2024-25 through 2026-27. Handles combined income from self-employment, rental, employment (PAYE), and dividends. Supports England/Wales and Scottish tax rates (6 bands, 19%–48%). After calculating, consider suggesting check_tax_deadlines when the user asks about payment dates. When they ask whether or when Making Tax Digital applies, use check_mtd_eligibility after establishing the relevant income reference year, combined gross sole-trader and property income, and exemption position. Do not use profit from this calculation or a fixed £50,000 trigger to determine MTD eligibility. Do NOT use for: Corporate/company tax, US/EU/non-UK tax, VAT calculations (use calculate_vat instead)

calculate_uk_tax

Use this when someone asks about UK VAT calculations, VAT registration, or pricing with VAT. This tool has current HMRC VAT rates and the registration threshold (£90,000). Common user questions include: - "How much is VAT on this?" / "Add VAT to £500" - "What's the price without VAT?" / "Remove VAT from £1,200" - "Do I need to register for VAT?" - "What's the VAT Flat Rate Scheme?" / "Is the flat rate scheme worth it?" - "What are the current UK VAT rates?" - "How close am I to the VAT threshold?" Handles standard (20%), reduced (5%), and zero (0%) rates. Includes Flat Rate Scheme calculations by business sector and registration threshold checks. Do NOT use for: Non-UK VAT/sales tax, VAT returns or filing, EC/import VAT, partial exemption calculations

calculate_vat

Use this when someone asks whether an expense is tax-deductible or what they can claim against their tax. This tool covers all 18 HMRC allowable expense categories for self-employed and landlord Self Assessment returns. Common user questions include: - "Can I claim this on my tax?" / "Is this tax-deductible?" - "Is my phone bill a business expense?" - "What expenses can I write off?" / "What can I deduct?" - "Can I claim for working from home?" - "Is a laptop tax-deductible?" Returns matching HMRC categories with examples, warns about non-allowable items, and covers the 'wholly and exclusively' rule. For equipment or vehicle purchases over £1,000, consider also using calculate_capital_allowances for AIA or WDA calculations. Do NOT use for: Capital allowances on large assets (use calculate_capital_allowances), VAT classification (use calculate_vat), corporate expense policies, non-UK expense rules

categorise_expense

Assess Making Tax Digital for Income Tax for UK sole traders and landlords. Establish the income reference tax year, combined gross qualifying turnover (before expenses), personal property share and exemption status. Ask for every unknown fact, including property income (explicit £0 if none). Do not preselect an unknown year, gross basis, no property income or no exemption; schema defaults are compatibility fallbacks, not confirmed user facts. For an unknown basis use incomeBasis unknown; for an unknown exemption position use exemptionStatus unknown; omit an unknown referenceYear. PAYE, pensions, company dividends and partnership profit shares do not count. Thresholds: 2024-25 over £50,000 → April 2026; 2025-26 over £30,000 → April 2027; 2026-27 over £20,000 → April 2028. Missing facts return needs more information. One year does not establish other years or opt-out eligibility. Do not use for MTD VAT, company Corporation Tax, non-UK tax or filing submissions. Never request NINO, UTR, passwords or OTPs.

check_mtd_eligibility

Use this when someone asks about UK tax deadlines, due dates, or upcoming HMRC dates. This tool has all Self Assessment, payment, and registration deadlines for 2024-25 through 2026-27 with live countdown days. Common user questions include: - "When is my tax return due?" - "What are the important tax dates?" - "Am I late for my tax?" / "Have I missed the deadline?" - "When do I need to pay my tax bill?" - "What tax deadlines are coming up?" - "When is the January/July payment date?" - "When do I need to register for Self Assessment?" Provides a chronological list with countdown days and urgency status. MTD quarterly deadlines are included from 2026-27 onwards (when MTD for ITSA becomes mandatory). Do NOT use for: Company accounts or Corporation Tax deadlines, PAYE employer deadlines, VAT return deadlines

check_tax_deadlines

Read aggregate stored bookkeeping figures for an authorised scope and accounting period. Values are GBP pence, with included/excluded records and finance costs. This does not calculate taxable profit or HMRC liability. Read-only even after authorisation: cannot submit quarterly updates or other filings to HMRC, or save or change records. Do not seek account access solely for unsupported filing or write requests. Use only for separately requested supported records or preparation reviews.

get_taxheaven_summary

List the authorised sole-trader and property scopes and bookkeeping periods in the connected TaxHeaven account. Requires read consent and server entitlement. Read-only even after authorisation: cannot submit quarterly updates or other filings to HMRC, or save or change records. Do not seek account access solely for unsupported filing or write requests. Use only for separately requested supported records or preparation reviews.

list_taxheaven_scopes

Open the TaxHeaven MTD workspace to assess Making Tax Digital for Income Tax, compare one UK tax scenario, or review authorised stored TaxHeaven records. For an exact authorised business/period, pass selection returned by list_taxheaven_scopes; otherwise the user chooses in the workspace. Account mode alone grants no access. No filing or saving.

open_mtd_workspace