Experts on

from £3 a month (software only)

Sage 50

from £20 a month (software only)


from £8 a month (software only)

And much more...

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 Quickbooks, Xero and Sage.


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 Xero, Sage 50 or Quickbooks? 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

03/06/2020 Quickbooks Online: Invoices and Sales Webinar

The first in our series of new QBO webinars

09/06/2020 Xero Sales Invoicing Webinar

Expand your Xero knowledge

10/06/2020 Quickbooks Online: Bills, classes and location Webinar

The 2nd in our new QBO webinars

10/06/2020 Virtual Members' Meeting

Members will have had an email with the details

11/06/2020 Microsoft Excel: Cashflow forecasting and presentation webinar

The 2nd in our new Excel webinars

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 Vanden

Office and Digital Marketing Manager

When she's not geeking out at conventions or writing, 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


May 19 / Posted by Rebekah Vanden

Are your finances affecting your mental health ...

5 Tips to reduce your financial anxiety One of the most awful feelings is when you know you have bills to pay and you don’t know where you are going to get the money from. Our Director, Karen, has been in this position and knows just how difficult it is. So we wanted to share […]

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Apr 6 / Posted by Rebekah Vanden

BeCOS Bookkeeping Matters – Spring 2020 ...

Welcome to our Spring newsletter. This quarter we’ll be sharing our top 5 tried and tested cloud accounting softwares. We also interviewed Rik Heap from Leonard Curtis for his advice on rescuing and recovering businesses. Plus read about our new staff achievements and meet our new apprentice. We also now have a dedicated Coronavirus support and […]

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Dec 13 / Posted by Rebekah Vanden

BeCOS Bookkeeping Matters – Winter 2019 ...

Welcome to our Winter Newsletter. This quarter we’ll be sharing how you could improve your cash flow. Plus we interview Amanda Fearn from WPA about how to support your employees with their health. COS Crew News What have our staff been getting up to this quarter? Find out here. *** Ann gets festive on her […]

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Nov 20 / Posted by Rebekah Vanden

5 Reasons why we’re proud of our Bookkeepers – ...

It’s Global Bookkeeping Week so we are taking this opportunity to shout about how proud we are of our members and employees. There are far more than 5 reasons why we’re proud of our bookkeepers! But we couldn’t very well name them all on here, it would be a long read indeed. 1. They have […]

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Oct 23 / Posted by Rebekah Vanden

BeCOS Bookkeeping Matters – Autumn 2019

Welcome to our Autumn newsletter! This quarter we tell you how we said goodbye to expense claims and how you can do the same. We also interviewed local pet expert Carys Middleton from Mojo Pet Companies. She shares her tips and business advice with us. Plus we have weddings, engagements, and births to announce! We’ve […]

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Jul 1 / Posted by Rebekah Vanden

BeCOS Bookkeeping Matters – Summer 2019 ...

In this edition, we’ll be helping you decide if you’re using the right accounting software. We will also be sharing some health and safety advice from Luke at Orchard Compliance. Plus lots of exciting news from the COS crew (including an upcoming wedding). COS Crew News – Summer 2019 Find out below what staff and members […]

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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 was so, so useful!  I did a Payroll Management Diploma last year but your webinar explains things much more clearly.”

“Thank you for a really great day yesterday, I felt that I really learnt a lot and that’s down to the way you [Diane] taught us.”

“COS has been Aquacut Limited’s bookkeeper and trusted advisor for a number of years and have been a vital partner during our exciting journey as we developed our business.

When I bought the business seven years ago, COS were the bookkeepers at that time.  We wished to transition from a one-user, dated accounting system to one based ‘in the Cloud’ and COS were important in advising us of our options and holding our hands during the transition.

Our business is over four times as large as it was seven years ago.  Our company has developed into e-commerce and entered new markets.  COS has been professional advisers, with great feedback and recommendations as well as responding professionally and quickly as we explored together various systems we could adopt.  I’m confident we would have struggled without COS support as they have been there for us, every step of the way.Karen and her team are professional, but user friendly in their approach to business. I cannot recommend them highly enough.”

“I have worked with COS Bookkeeping for over ten years and have always found them to be knowledgeable and efficient. They provide a great deal of support to our mutual clients not only in terms of bookkeeping but also the industry and software knowledge they use to assist clients run their businesses more efficiently.”

“COS Bookkeeping have for many years been a huge support to Allens and our clients. They provide superb service and the quality of the training is top notch. They are consistent, extremely professional and, unsurprisingly, in great demand. I would not hesitate to recommend Karen and her team, and have done many times always with the best outcome for my clients. Karen is passionate about her work as well as being a great communicator with clients on all levels. She deserves her success.”

“It has been my pleasure to have known Karen, Diane and the COS team for nearly ten years now. We first met due to my work with The Federation of Small Businesses and COS have been an important supporter of the organisation.

In all my dealings with COS I have found them to be highly professional and diligent throughout. Furthermore, they have positioned themselves as an integral part of the business community in the Manchester area due to Karen and Diana’s ever-present high profile.I would also go on to say that as a company they are very well respected by the Manchester businesses as bookkeepers and experts in their field.”

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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