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What changes in 2027 — US and UK: brackets, W-2, Self Assessment, Making Tax Digital

Dated changes for freelancers, small employers, landlords and households in the US and the UK — each with its official source, the date, and a free tool to check your own case right away.

United States

IRS tax year 2027 inflation adjustments (brackets, standard deduction) — 2026 set was released Oct 9, 2025 (IR-2025-103)

From: 2027-01-01 · Who it hits: US freelancers and households planning withholding/estimated tax
Official source: irs.gov · read on 2026-10-03
IR-2025-103, Oct. 9, 2025 — tax year 2026 annual inflation adjustments
Check it free: Estimated Tax Safe Harbor Checker 2026
Most searched in August

2026 Forms W-2/W-3 due to SSA by February 1, 2027 (Jan 31 falls on a Sunday)

From: 2027-02-01 · Who it hits: small employers and payers of contractors
Official source: irs.gov · read on 2026-10-03
The due date for filing 2026 Forms W-2 ... with the SSA is February 1, 2027
Check it free: 1099 Threshold & Penalty Check 2026 (US)1099-DA Basis Gap Checker (2026)
Most searched in January

United Kingdom

Self Assessment online return and payment by 11:59pm on 31 January 2027

From: 2027-01-31 · Who it hits: UK self-employed, landlords, side-income earners
Official source: gov.uk · read on 2026-10-03
submit your online tax return by 11:59pm on 31 January 2027
Most searched in January

Making Tax Digital for Income Tax: qualifying income over £30,000 (2025-26) → must use it from 6 April 2027

From: 2027-04-06 · Who it hits: UK sole traders and landlords with £30k+ income
Official source: gov.uk · read on 2026-10-03
£30,000 for the 2025 to 2026 tax year, you will need to use it from 6 April 2027
Check it free: MTD for Income Tax 2026: are you in, and on which dates
Most searched in January
Every tool for this country with one key. The Pro features of every calculator and checker for this country plus every 2027 update — one key, cancel any month.
US pack — $9/monthUK pack — $9/month
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Questions

When does this apply: IRS tax year 2027 inflation adjustments (brackets, standard deduction) — 2026 set was released Oct 9, 2025 (IR-2025-103)?

From 2027-01-01. Who it hits: US freelancers and households planning withholding/estimated tax. Official source: https://www.irs.gov/newsroom/irs-releases-tax-inflation-adjustments-for-tax-year-2026-including-amendments-from-the-one-big-beautiful-bill

When does this apply: 2026 Forms W-2/W-3 due to SSA by February 1, 2027 (Jan 31 falls on a Sunday)?

From 2027-02-01. Who it hits: small employers and payers of contractors. Official source: https://www.irs.gov/instructions/iw2w3

When does this apply: Self Assessment online return and payment by 11:59pm on 31 January 2027?

From 2027-01-31. Who it hits: UK self-employed, landlords, side-income earners. Official source: https://www.gov.uk/self-assessment-tax-returns/deadlines

When does this apply: Making Tax Digital for Income Tax: qualifying income over £30,000 (2025-26) → must use it from 6 April 2027?

From 2027-04-06. Who it hits: UK sole traders and landlords with £30k+ income. Official source: https://www.gov.uk/guidance/check-if-youre-eligible-for-making-tax-digital-for-income-tax