Your levers on tax policy

Find and contact your MP

Find who represents you at members.parliament.uk/FindYourMP, or write to them through WriteToThem — a free mySociety service that turns your postcode into your MP's contact details.

“MPs will generally only act on behalf of people who live in their own constituency” — so write to your own MP, not a well-known one on your issue. Writing is recommended over other channels because it “provides a written record.” Mass-mailing every MP is explicitly discouraged — official guidance says “mass mailings will not get their attention” — so one letter in your own words carries more weight than a form letter forwarded to every MP.

WriteToThem “block[s] ‘identikit’ letters” on purpose — it only works for your own representatives, and it wants your own words, not a template.

What an MP can actually do for you

• Ask a parliamentary question — oral or written. It “may secure information or a commitment from the government and guarantees that the minister's reply is put on the record.” Written questions and answers are published at questions-statements.parliament.uk.
• Push for a Westminster Hall debate — motions are neutral (“That this House has considered [X]”), with no amendments and no votes, but the minister must attend and give a considered response.
• Sign or ask for an Early Day Motion (EDM) — a visibility tool, not a decision tool. “In an average session only six or seven EDMs reach over two hundred signatures”, and there is “no rule whereby the number of signatures affects the likelihood of an EDM being debated.”
• Ask your MP to table (or support) a Finance Bill amendment or New Clause — “MPs can also propose an amendment or New Clause to a relevant government bill while it is being considered in the Commons.” Tabled amendments appear in the publications section of the bill's page on bills.parliament.uk. The window is short — Finance Bills usually move from second reading to Royal Assent in well under four months (see How a tax law is born for the exact timeline).
• Ask your MP to write privately to a minister — “MPs' correspondence with ministers is prioritised by civil servants who must provide a ‘high quality’ reply in a timely manner.”

Sources: Contact your MP — UK Parliament, Raising an issue as an MP or Lord, Early Day Motions, WriteToThem — about & Q&A.

Give written evidence to a select committee

The Treasury Committee is “appointed by the House of Commons to examine the expenditure, administration and policy of HM Treasury, HM Revenue & Customs, and associated public bodies, including the Bank of England and the Financial Conduct Authority.”

Committees launch inquiries with a “call for evidence” — anyone with relevant knowledge or personal experience can submit. The live list of inquiries currently accepting evidence is at committees.parliament.uk/inquiries— each inquiry page links its own submission form and deadline.

Format, quoted exactly: “Keep your evidence short and to the point. Use section headings and numbered paragraphs.” Send “a single file in Microsoft Word or another editable format” — not a PDF, under 25MB — and “Do not include your contact details” in the document itself. Your contribution “must be original”, not already published elsewhere.

Evidence is normally published permanently under your name; you can ask for anonymity or confidentiality, but “it is for the committee to say whether it will agree”. And plainly: “Committees cannot help you with an individual problem or a specific complaint.” — that's the wrong door for this route.

Committee recommendations “are not binding on the Government. But they are influential.”

Sources: Treasury Committee, Give evidence to a select committee.

Write to the Finance Bill's Public Bill Committee

After a bill's second reading, it's usually referred to a Public Bill Committee. If that committee issues a “call for evidence”, anyone can submit written evidence while the committee is meeting — it's circulated to all the MPs serving on the committee.

The Finance Bill's committee stage is compressed into weeks, not months — see How a tax law is born for the real dates. If you want to influence this year's Bill, send evidence as soon as second reading happens, not after.

Sources: Input into legislation — UK Parliament, Scrutiny Unit — written submissions.

Send a Budget representation to HM Treasury

“A Budget representation is a written representation from an interest group, individual or representative body to HM Treasury” — suggestions should “explain the policy rationale, costs, benefits and deliverability.”

Channels: a per-event online portal once one is announced, email [email protected], or post to The Correspondence and Enquiry Unit, HM Treasury, 1 Horse Guards Road, London, SW1A 2HQ. Be honest with yourself: the guidance says plainly, “Representations will not receive a bespoke written reply.” It's cheap to do and genuinely read as an input sweep before each Budget — but be honest about the whole picture: no bespoke reply anda zero feedback loop, so you'll likely never learn whether your representation was read, considered, or changed anything. Best used for one specific, costed, deliverable ask, not a general complaint. Watch gov.uk for the representations portal once the next Budget date is announced.

Source: Guidance for submitting your Budget representation.

Petitions — honest thresholds

“Petitions that get 10,000 signatures get a response from the UK Government.” “All petitions that get 100,000 signatures will be considered for debate, and are usually debated” — usually in Westminster Hall. A new petition needs 5 supporters to publish and runs for 6 months.

Two real tax petitions show the range: a petition against Making Tax Digital reached 20,086 signatures and got a government response — but was never debated, while a petition to raise the income tax personal allowance reached 281,794 signatures and was debated in the Commons on 12 May 2025— but the government's position on the allowance itself did not change.

Honest takeaway: petitions reliably produce an on-the-record government statement at 10,000 signatures and sometimes a Westminster Hall debate at 100,000 signatures — they put an issue on record and give MPs a peg to raise it. But no recent tax petition has by itself changed tax policy. Treat petitions as an awareness tool, not a decision-making one.

Source: petition.parliament.uk/help.

Freedom of Information — ask how the system works

mySociety describes WhatDoTheyKnow plainly: “Make FOI requests to over 24,000 public authorities in the UK, or browse a massive online public archive of information, for free.” Because both the request and HMRC's answer are published, one person's FOI answer becomes everyone's answer — try HMRC's page on WhatDoTheyKnow or the WhatDoTheyKnow archive generally before you write a fresh request. You can also write to HMRC directly: [email protected], or HMRC Freedom of Information Team, S1715, 6th Floor, Central Mail Unit, Newcastle Upon Tyne, NE98 1ZZ.

Want your own data instead of general policy information? That's a Subject Access Request (SAR), not FOI — HMRC's SAR route (and the full FOI-vs-SAR explainer) is covered on Who runs your taxes.

Sources: mySociety — WhatDoTheyKnow, CRCA 2005, s.18, CRCA 2005, s.23, HMRC Information Disclosure Guide, IDG40150.

Respond to a consultation so it actually counts

Live HMRC and HM Treasury consultations are listed on the gov.uk consultations hub, filterable by department. The Cabinet Office's Consultation Principles say government should consult “only on issues that are genuinely undecided”, using “clear language and plain English.” HM Treasury's Tax Policy Making Principles (published 12 June 2025) add that formal tax consultation will be “targeted and precise” — windows are getting shorter, so watch for openings.

What actually gets read: evidence of impact beats opinion. A response that says “I don't like this” is easy to set aside; a response with your own hours, £ cost, software cost, or a specific broken scenario is the kind that has visibly changed detail in past Finance Bills. Structure it simply: who you are (one line), the specific proposal paragraph you're answering, your real numbers, and the change you're proposing. Nothing restricts consultations to professional bodies — an individual sole trader's response with real figures is rare, and memorable for it.

Every consultation page carries its own response route — for example, the live “Timely Payments in income tax Self Assessment” consultation can be answered by online form, by email, or by post, all listed on the consultation page itself.

Sources: Consultation Principles, Tax Policy Making Principles, Timely Payments in income tax Self Assessment.

The transparency toolbox

TheyWorkForYou lets you “discover who represents you, how they've voted and what they've said in debates”, free. Set up an email alert on a keyword you care about — a search for the exact phrase “Making Tax Digital” in Hansard turned up 231 contributions, 10 written statements and 4 debates — Hansard is the official transcript of everything said in Parliament.

Every statutory instrument laid before Parliament since June 2004 carries an Explanatory Memorandum — plain-English notes on what the SI does and why, written for readers who aren't legally qualified. Find it under the “Explanatory Memorandum” tab on the SI's page at legislation.gov.uk. It's the fastest way to read what a technical tax SI actually does without a law degree.

Departments including HMRC publish an “Organogram of Staff Roles & Salaries” — an organisation chart of every staff role, with names and salary details for senior civil servants. Find any department's at data.gov.uk.

Sources: TheyWorkForYou, legislation.gov.uk — Explanatory Memoranda, HMRC organogram — data.gov.uk.

What actually moves the needle

A hundred identical letters are actively discounted, not amplified — WriteToThem blocks “identikit” letters because MPs “rather naturally take a sudden influx of identical or similar messages with a large pinch of salt”. One clear, evidenced, personally-written submission — to your MP, a select committee, a consultation, or Treasury — is worth more than a hundred copies of the same paragraph. Quality, aggregated with real numbers, beats quantity, duplicated.

Be civil in every one of these channels — the people reading select-committee inboxes and consultation responses are often the same officials who will act on good evidence, and a hostile tone gets a submission set aside as fast as a form letter does. Bring facts and your own numbers, not adjectives, and expect timescales in months and years, not days — every lever on this page is real, but none of them is instant.