Bookkeeping,Tax Self Assessment and Payroll Services

GIVING YOU MORE TIME AND HELPING YOUR BUSINESS GROW

self-assessment tax returns

ABOUT US

MK Administration is a small bookkeeping practice and payroll bureau who help small to medium size businesses stay on top of their bookkeeping.

Our clients know at all times the financial state of their business. We keep you compliant with HMRC’s ever-growing demands of small businesses.

WHAT WE DO

Weekly/monthly bookkeeping services

VAT Returns

VAT Registration

Xero/Quickbooks/Sage training

Self Assessment

End to End Payroll

Credit Control

Auto Enrolment and Pension Compliance

CIS

One-off tidy up work

Marcella Kenny

Marcella Kenny

Director
Lucy Best

Lucy Best

Bookkeeper
Martyn Bayley – Bookkeeper

Martyn Bayley

Senior Bookkeeper
Niamh

Niamh Morris

Administrator

WHY CHOOSE US

We become part of your team

You will be provided with a monthly report to show how well your business is doing

You will have a monthly or quarterly meeting with Marcella to discuss your financials

You will have peace of mind that your business bookkeeping is taken care of correctly

WHAT THEY SAY ABOUT US

slant accountants

You and your team take the stress away from clients by giving them the peace of mind knowing their bookkeeping is being completed correctly. This gives them back their valuable time to either focus on their business or additional personal time. You and your team are always available for clients, and you go above and beyond in delivering your services.
Jamie Allen
Partner, Slant Accountants

"Marcella - Your attention to detail is exactly what my business is missing and I have absolutely no doubt whatsoever that the addition of MK Administration to my business as a virtual assistant will be one of the main reasons why my business will succeed"

Alun Brown
Owner - Combicare Bridgend Ltd

"Marcella supported me in the early days of my business with anything I needed doing. She set up my accountancy software, invoiced my clients, paid my bills, registered me for VAT and other HMRC services. Nothing I asked of her was too much trouble.  She was enthusiastic, organised and professional".

David Greener
Director at Greener Estates, Cardiff

"Thank you so much for looking after the VAT returns at very short notice for a less than straight forward client (...) In under 10 days, you had managed both understand what was needed and finalise the necessary returns. I would have no hesitation in recommending your ability and tenacity to other clients and contacts as I know they would be in safe hands."

Andrew Jones
Director at A4B (Cardiff) Ltd

"I worked with Marcella where she managed a business park. I found her efficient, reliable, knowledgeable about her work and she paid plenty of attention to detail. Marcella was a pleasure to work with and was always friendly. I would recommend Marcella".

Jeremy Godfrey
UK Financial Controller at Millbrook Group, London

"Your passion, drive and tenacity for getting the job done using your administrative skills has been a big help to my company and mean that I have more time to focus on generating income rather than dealing with paperwork, which, whilst very necessary, is not an aspect of the job that I enjoy or have time for."

Christopher C. Price
Director at Chris Price Financial Consultancy, Barry

"I cannot recommend Marcella enough for her friendly and pro-active approach. It's great to be able to recommend someone and even better, know that they are going to follow up on what you have asked them to do. "

Charlotte Hurford
Claims Surveyor at Claimrite, Swansea

"Marcella has helped with all my administration and taken a lot of pressure off my busy workload, anytime I telephone her I am met with a happy voice and very helpful advice. I would not hesitate to recommend Marcella's services to everyone."

Damian Fitzpatrick
DJF Services, Cardiff

"Whether it is book-keeping or attending appointments on my behalf, dealing with third parties and following up on matters, you have been diligent and most helpful and I would therefore not hesitate to recommend you and MK Administration to clients, friends and family."

Chris Price
Director at St James's Place Wealth Management , Barry

"Marcella was able to identify an issue in my bookkeeping system and recommended suitable software to help solve the shortfall. Not only did Marcella identify the perfect solution, her ongoing support and knowledge has been invaluable in ensuring I use Xero to its full potential."

Richard Watson
Independent Partner of UW, Cardiff

An Ode to MK Administration and Bookkeeping

I was thrilled to receive the following testimonial in the form of a poem by Joe Henderson of Hendersons Health and Safety Solutions.

To Marcella, with Thanks
Date: 30th July 2025


So I launched my business dream with grand intent,

Ideas aplenty, blood and sweat my passion well spent.
Bu~ spreadsheets? Chaos. Bills a blur.
Financial finesse? Not so much, sir.

My accounts a mess, bills to pay and clients to chase,
Enter Marcella with a masterclass - pure grace -
She showed me how to tame the pace,
And put my finances back in their place.

BNI visitor host, she leads the way,
With Irish eyes that brightly sway.
Her lilting voice and warm hello
Giving all our early starts a cheerful glow.

Cardiff Blues, a second home -
Where wine flows free and fans all roam.
Though Lions triumphed on Aussie soil,
Her cheer was wrapped in Emerald foil.
From big hits and spectacular tries,
To making sure HMRC don't catch up with our lies!

To Marcella - sharp, sincere, and bright,
With sawy calm and fearless might.
A steady hand through fiscal fight,
She can turn your financial chaos into control and insight.

GET IN TOUCH

self-assessment tax returns

07973 739 540

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