Experts on

from £2 a month (software only)

Sage 50

from £20 a month (software only)

Sage Business Cloud Accounting Start

from £10 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 Business Cloud, Sage 50, or Xero? 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

18/12/2018 Xero Level 2 Training Course

We recommend attending the Level 1 first

15/01/2019 Xero Level 1 Training Course

The Xero 101

19/01/2019 COS Members Meeting for Bookkeepers and Accountants

Speaker: Paul Giness from The Beattie Partnership

22/01/2019 ero Level 2 Training Course

We recommend attending the level 1 first

12/02/2019 Xero Level 1 Training Course

The Xero 101

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 she's not planning her wedding or geeking out at conventions; Becky has a variety of responsibilities at COS. Whether that be tweeting, 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 14 / Posted by Rebekah Garrattley

BeCOS Bookkeeping Matters – Winter 2018 ...

In this edition, we’re sharing our self-assessment advice. We also interview Hannah Dempsey, from the charity FOP Friends, about an illness you may never have heard of. You can also see what the COS crew have been up to. Please note that our Christmas hours can be found at the bottom of this page. The COS Crew […]

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Oct 1 / Posted by Rebekah Garrattley

BeCOS Bookkeeping Matters – Autumn 2018 ...

Welcome to our Autumn 2018 COS Newsletter – BeCOS Bookkeeping Matters! Welcome to our Autumn 2018 newsletter. In this edition we share essential things you might not know about payroll. We also get advice from Lucia and Franck at Saco Trading about staying healthy this Autumn. The COS Crew have some very special occasions to […]

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Quarterly Newsletter - Summer

Jul 30 / Posted by Rebekah Garrattley

BeCOS Bookkeeping Matters – Summer 2018 ...

Welcome to our Summer 2018 Edition of BeCOS Bookkeeping Matters! In this edition you can find out how to save hours of data entry. You’ll also get some wonderful tips on how to survive at work from Becky and Gemma at Go Train and Develop. Do you like cats? The Society for Abandoned Animals are […]

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Apr 23 / Posted by Rebekah Garrattley

BeCOS Bookkeeping Matters – Spring 2018 ...

 Welcome to our Spring 2018 Edition of BeCOS Bookkeeping Matters! In this edition we have a revised pet section which is now “Pet Adoption Corner”. We’ll be featuring a different animal in each edition that is in desperate need of a home. We also have a new section featuring news about the COS Crew! Plus […]

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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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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

“It’s a great company you have, seriously!!

“I always seem to think it is in such a mess […] but it never seems to phase you and as always you breeze through sorting it out and putting things where they should be and making it easier for me moving forward. As always it’s great to see you and I am truly grateful for your help and advice.”

“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

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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