Tax Calendar: Important Dates & Deadlines
March - April 2018

This article was published on 02/04/2018

March 2018

1st - 2016/17 Self Assessment payment now 30 days late = 5% charge on the tax owing on that day.
13th - Budget Day - The Spring Budget Day.
31st - Closing date to claim for the Winter Fuel Benefit for this year.
March - Last minute tax planning. Double check you have availed of all relevant allowances/ exemptions for capital gains tax, inheritance tax, ISA's and pension. Check out our article on making the most of your annual allowances.

1st - Last chance to pay any balance of 2016/17 tax and Class 4 NICs to avoid an automatic 5% late payment penalty.
1st - New advisory fuel rates for users of company cars effective from today.
19th (22nd if paid electronically) - PAYE, Nat. Ins.,Student Loan & CIS monthly deductions due. Last day to send in Employer Payment Summary's (EPS) for month ended 5th March.

1st - Introduction of the new 16.5% VAT flat rate for businesses with limited costs. More Info here.
5th - End of 2016/17 tax year. Last chance to avail of annual exemptions for capital gains tax, inheritance tax, pension allowances and ISA's
5th - Last chance to use up any unused pension allowance from 2014/15; or to claim back any overpaid tax from 2013/14; or to top up your NI contributions for the sake of your state pension for 2011/12.
6th - New tax year commences as do any tax changes such as the increase in the basic personal allowance to £11,850
6th - HMRC issue Self Assessment Returns and Notices to Complete a Return for the year to 5 April 2018.
30th - Last chance to avoid the £10 a day additional penalty on outstanding 2016/17 Self Assessment tax return.

6th - Employers must check their payroll software incorporates the 2018-19 changes from today. Also make sure any relevant changes to employees tax codes for the 2018/19 year have been made.
19th - Your final Full Payment Submission (FPS) for the 2016-17 year should be returned by today.
19th (22nd if paid electronically) - 1st quarter PAYE/Nat. Ins. payments due for period 6th Jan to 5th April 2017.
19th (22nd if paid electronically) - PAYE, Nat Ins, Student Loan & CIS monthly deductions due.
19th (22nd if paid electronically) - Interest is charged on any outstanding PAYE/CIS from 2016/17.

Tax implications of the SEISS- Getting To Grips With Grants and your Self Assessment 27/05/21How will the Self-Employed Income Support Scheme impact your next Self Assessment return?
The First 5 Steps To Self-Employment 27/04/21We take you through the initial steps to going solo.
End of Tax Year planning - Use your Allowances to reduce your tax bill. 01/04/21Last minute Tax Planning. Our guide to what annual allowances you have and how to use them to reduce your tax bill.
Guide to Personal Savings Allowance 31/03/21How much interest on savings can you earn each year, before you have to pay tax?
Self Assessment Guide by Listentotaxman 31/03/21Our guide to making your online self-assessment return with tips on reducing your tax bill and avoiding fines.
Self Assessment Expenses you can claim back as an employee 06/01/21Wondering what everyday work expenses you can claim back on your self-assessment form? Here are some expenses that a PAYE paying employee can claim. Note these can also be backdated.
Capital Gains Tax What’s Changing and What You Need to Know 22/12/20We take a look at the possible changes coming to CGT as a result of the recent OTS review.
A Guide to Payment on Account for the Self-Employed 27/11/20What you need to know...
Small business guide to running payroll and staff benefits 28/10/20A guide to navigating payroll and staff benefits as a small business.
How do the very rich avoid inheritance tax 27/10/20Our guide to IHT-avoidance measures used by the mega-wealthy.