Experts on

from £2 a month (software only)


from £20 a month (software only)

Sage One

from £3 a month (software only)


from £19 a month (software only)

How we can help


Know that you and your employees will get paid correctly and on time.

COS Membership

70% off training courses, software assistance, work experience, possible job opportunities and more...


Our bookkeeping service can be tailored to suit your business needs. From Management Accountants to College Students; we have a huge range of experience levels.

Accounts Software Training

We provide accounts software training for a variety of packages which include but are not limited to Sage, Xero and FreeAgent.


Hi there! We’re COS Bookkeeping and we’re based in Urmston (Manchester). We specialise in simplifying those complicated terms you often find in HMRC letters that make companies start to panic. We help you to achieve organisational bliss when it comes to your accounts. We do this in a number of ways.
Maybe you need a special software like Sage, Xero or FreeAgent? Maybe you need some training? Maybe you need a new member of staff? There are many ways in which we can help.

We also provide a membership scheme to support Bookkeepers and Accountants. Members receive 70% off training courses, software assistance, work experience and possible work placement. Our Membership service also provides discount on training, industry updates, an exclusive networking group and much more.

Upcoming Events

17/03/2018 COS Meeting for Bookkeepers and Accountants

Our Speaker: Simon Edmondson from the FSB

19/04/2018 Xero Level 1 Training Course

Learn how to set up Xero correctly. The Xero 101.

21/04/2018 COS Meeting for Bookkeepers and Accountants

Speakers: Alex and Noel from Atherton Clarke

17/05/2018 Xero Level 2 Training Course

We recommend attending the Level 1 first

05/06/2018 Xero Level 3 Training Course

We recommend attending the Level 1 and 2 first

View all events

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Feel in control of your business finances

Book a free consultation

Our Team


Karen Garrattley

Managing Director

Karen is the Queen of COS, she started the business way back in 1991. When she's not playing her guitar and Producing shows she's following up leads, trying new accounting packages, and being Captain to our ship.

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Diane Middleton


Diane is the keeper of the keys as our Financial Director. When she's not counting beans she loves nothing more than a nice walk in the countryside.

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Becky Garrattley

Office and Digital Marketing Manager

When Becky isn't at home baking and listening to metal; she's taking care of COS. Whether that be blogging, managing the office, or planning events; no two days are the same.

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Ann Lavelle


Meet Ann: Bookkeeper by day, Barry Manilow fan by night. Ann began her journey with us as a COS member and has become a highly valued Consultant and Trainer in the COS Team.

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Latest news


Dec 18 / Posted by Rebekah Garrattley

BeCOS Bookkeeping Matters – Winter 2017 ...

Ho, ho, ho, it’s nearly Christmas and our Winter Newsletter is here! BeCOS Bookkeeping Matters Welcome our winter newsletter. We have lots to share with you: from tips to help you with your self-assessment to how to make your card payments easier. You can also find our Christmas hours at the bottom. Guess Who Can […]

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Oct 31 / Posted by Rebekah Garrattley

BeCOS Bookkeeping Matters – Autumn 2017 ...

It’s time for the Autumn Edition of our Quarterly Newsletter: BeCOS Bookkeeping Matters! Thanks for stopping by to read our newsletter. In this addition we tell you how to stop bookkeeping becoming a “monster”! Stuart Sinclair from CVSL has essential advice on car leasing in our interview section. You’ll find out how much we raised […]

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Oct 19 / Posted by Rebekah Garrattley

Celebrating our Members this Global Bookkeeping ...

It’s Global Bookkeeping Week and we’d like to say a huge thank you to every one of our hard-working members. From those who have been with us for 15 years to those who have been with us a matter of days. You are a part of the COS family and we thank you for that. […]

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Sep 1 / Posted by Rebekah Garrattley

6 Vital Reasons You Shouldn’t Leave Your ...

The last thing any business owner needs is to stress about their accounts. The more time you give yourself and the more tools you invest in, the less stressful it will be. We’ve put together a list of reasons why bookkeeping shouldn’t be at the bottom of your list. There could be huge fines via […]

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Jul 25 / Posted by Rebekah Garrattley

BeCOS Bookkeeping Matters – Summer 2017 ...

Welcome to the Summer Edition of our Quarterly Newsletter: BeCOS Bookkeeping Matters! Thanks for being a part of our newsletter. We have another great interview lined up for you, this time from Mark at Ralli Solicitors about how to deal with employee disputes. You can read all about it below. We also delve into the history and […]

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Mar 31 / Posted by Rebekah Garrattley

BeCOS Bookkeeping Matters -Spring 2017 Newletter

Welcome to the Spring Edition of our newsletter – BeCOS Bookkeeping Matters. Firstly, welcome to our new website! We’re really excited about it but please bare with us, we’re still working on it in places.In this edition we have hints and tips about household renovations from Chris at Technique. We’ll be telling you “Things you […]

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We do both. For 1-2-1's please email For classroom please visit:

Yes, we have a range of cost effective options. Xero, Sage and FreeAgent are all affordable. Xero starts at as little as £2 a month. For more details contact

That depends on what your requirements are. We can do a free consultation and recommend an appropriate software. Contact

What people say about us

“As a start-up company, things are fairly manic, and as part-time FD I inherited a somewhat rough and ready set of accounts. Ann has been a great help in sorting through this and getting some sort of order around things, particularly with regard to our VAT reporting. Her knowledge of the product and ability to help work through some of our issues is impressive.”

“I found it informative, really helpful and of course delivered expertly!”

“The way you [Diane Middleton] presented and the interaction with the group was excellent, it really was a good course to attend.”

Our bookkeeping is complicated because we have three different property entities, each with its own bank account and different ownerships.
Di Middleton handles this situation with efficiency and calmness.
I receive up to date management reports after each visit.
Di Middleton comes into our office two days every month. In a previous business career with a manual bookkeeping system, I had three bookkeepers full time.
The management information was months out of date.
My office is inside the much larger office of Oakwood Corporate Services, who have 19 staff. Di Middleton provides training for the Oakwood bookkeeping staff.

I appreciate Di very much. Di has an efficient, methodical and calming influence. Long may our relationship continue.
COS gives me peace of mind—it is a great service

Karen is proof that knowledge plus enthusiasm will take you a lot further in life than just knowledge. The world is full of hugely knowledgeable folk – but if they communicate this knowledge without the all-important ingredient of enthusiasm, people simply don’t listen. I look forward to getting excited [again] by the subject of bookkeeping!!

“I can’t thank you enough for all of your help over the past couple of months.
You and your team have been beyond amazing.”

Let us relieve the stress, contact us today

Know that your payroll is in good hands

Send a message or call on 0161 850 3355 to see how we can help you
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