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March 2026
March is a useful “get organised” month. It’s the last full month before the end of the tax year (5 April), and it also brings several major UK economic updates that can affect interest rates, pricing, wages and confidence.
Below is a March 2026 calendar you can copy into your own diary. As always, check your own VAT, PAYE and CIS accounts for your business-specific deadlines, especially if you have non-standard periods.
Quick “looking ahead” reminder
Quick “looking ahead” reminder
April is year-end season for many businesses and it is the end of the personal tax year on 5 April, so March is a good time to tidy records, chase missing invoices, and make sure payroll and VAT are up to date.
News / Articles
News / Articles
4 March 2026
Spring Statement 2026: the latest economic outlook and what it could mean for Yorkshire SMEs
2 March 2026
March is a useful “get organised” month. It’s the last full month before the end of the tax year
31 January 2026
31 January; the Self Assessment dealine is today. What if you miss it?
23 January 2026
Preparing for MTD Compliance: A Guide for Landlords
23 January 2026
Self Asessment season: the 31 January deadline isn't just about filing; it's about paying too
25 September 2026
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Contact
Contact
email: info@SmithAllen.uk
Mobile: +44 (0) 7491 770155
Tax and compliance
Tax and compliance
Sunday 1 March 2026
If your company has taxable profits up to £1.5m and your accounting period ended 31 May 2025, your Corporation Tax is usually due 9 months and 1 day after the year end. Large companies may have to pay by instalments, so deadlines can be earlier.
Saturday 7 March 2026
VAT returns and payment are usually due one calendar month and 7 days after your VAT period ends, so if your VAT period ended 31 January 2026, the deadline is typically 7 March 2026. As this falls on a Saturday, aim to submit and pay early to avoid last-minute issues.
Thursday 19 March 2026
CIS contractors: monthly CIS returns must reach HMRC by the 19th each month (for the tax month that ended on the 5th). It’s also a good prompt to check you’ve verified subcontractors and kept the right evidence on file.
Sunday 22 March 2026
PAYE and NIC payments are due by the 22nd of the next tax month for most employers paying electronically (or the 19th if paying by post). As the 22nd is a Sunday, plan to pay in good time so funds clear when they should.
UK economy and business data to watch
UK economy and business data to watch
Tuesday 3 March 2026
Spring Forecast and Spring Statement: the Chancellor is due to deliver the Spring Statement and the OBR will publish its Economic and Fiscal Outlook the same day. This can shape expectations on tax policy direction, public spending and the wider economic outlook.
Friday 13 March 2026 (7:00am)
A busy ONS release day, including the GDP monthly estimate (January 2026), UK Trade (January 2026) and the Index of Production (January 2026). These are useful signals for demand, costs, exports and the direction of the economy.
Wednesday 16 March 2026 (9:30am)
ONS publishes annual updates on what goes into inflation measurement, including the inflation “basket of goods and services” and related materials. This is handy context for pricing, wage conversations and customer sentiment.
Thursday 19 March 2026
Bank of England interest rate decision, with the MPC summary and minutes published the same day. Borrowing costs and market sentiment can move quickly around this date.
Thursday 19 March 2026 (7:00am)
ONS UK labour market release (pay growth, vacancies, unemployment indicators). Useful for budgeting staffing costs, hiring plans and salary reviews.
Friday 20 March 2026 (7:00am)
ONS Public sector finances (February 2026) release, often a major backdrop for fiscal commentary and political debate about spending and taxation.
Wednesday 25 March 2026 (7:00am)
ONS CPI inflation release for February 2026. Inflation trends feed into pricing, wage pressure and interest rate expectations.
Tuesday 31 March 2026 (7:00am)
ONS GDP quarterly national accounts for October to December 2025 are scheduled for release. This is a bigger revision point than the monthly estimate and can influence the broader growth narrative.
From £600 per year / £50 per month
Annual accounts
Annual Tax Returns
From £1,200 per year / £100 per month
Everything in Essential plus:
Payroll (Up to 10 employees)
Quarterly VAT Returns
Quarterly review meetings
From £2,400 per year / £200 per year
Everything in Standard plus
Payroll (Over 20 employees)
Annual Review meeting
Personal tax review
Awareness days and seasonal hooks for marketing and comms
Awareness days and seasonal hooks for marketing and comms
Tuesday 3 March 2026
World Wildlife Day is a good prompt for a short post about sustainability, local environment, or how your business reduces waste and improves efficiency.
Friday 6 March to Sunday 15 March 2026
British Science Week is a great hook for SMEs to talk about innovation, process improvement, technology, training, or “how we do what we do”.
Wednesday 11 March 2026
No Smoking Day is a simple wellbeing prompt for employers: signpost support, update workplace policies, or share a small “health at work” message.
Sunday 15 March 2026
Mothering Sunday (UK) can be a meaningful seasonal trading moment for retail, hospitality, services and local experiences.
Friday 20 March 2026
International Day of Happiness is a light, positive hook for customer appreciation, team culture, or a “thank you” message to clients and staff.
Saturday 21 March 2026
International Day of Forests is ideal for businesses with an environmental angle, local sourcing, or community projects involving green space.
Sunday 22 March 2026
World Water Day is a strong sustainability hook, especially for hospitality, manufacturing, cleaning, care and any business with water-heavy operations.
Saturday 28 March 2026 (8:30pm local time)
Earth Hour is a simple social post opportunity around energy efficiency and practical “small changes” in the workplace.
Sunday 29 March 2026 (1:00am)
Clocks go forward and British Summer Time begins. A practical reminder for shift patterns, opening times, bookings, and any systems that need manual time changes.
Tuesday 31 March 2026
World Backup Day is a brilliant SME reminder to check backups, passwords, MFA and recovery plans, not just antivirus.
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