Why use us You will get your accounts back faster

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You can see a full list of what we can do for you if you have a look here

What OSA McQuillan will do for you

We’re fast! On average, we got our clients’ business accounts ready in just 28 days in 2025 after we received their information. This gives you, the business owner, more time to plan your budget for the new year. You’ll also know that you’re up to date with the tax office and the Companies Office.

You can sign up with us by printing the form here, filling it out, and emailing it back to us: Register with us.

We give our clients a list of all the important dates for the year ahead, so they’re always prepared. This helps our clients avoid missing deadlines and paying late fees.

To get started, we send our clients a checklist of everything we need from them. This saves time and stops us from having to go back and forth asking for more information later.

We guarantee

We’ll Do All the Work
We’ll handle all the details when you switch from your old accountant to us. We promise to get all your information and process it correctly.

Stay on Top of Deadlines
We’ll make sure all your accounts and taxes are done on time.

We’ll send you reminders before deadlines so you never forget to file your tax forms or reports to the Companies Office.

Get Expert Help
We’ll give you advice to help your business make more money next year.

If you have a problem and need a fast answer, we’ll agree on a specific time frame to get back to you.

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Phone
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Only fill out this form if you would like to make OSA McQuillan your accountants and be a client of the company.

OSA McQuillan Accountants and Business Advisers

We promise you will get your accounts back faster.

Our focus

We Explain Things Simply
We’ll talk to you about your business’s money and taxes using simple words, not confusing accountant talk. We’ll do it quickly and give you advice that you’ll really find helpful. If this sounds good, you can check out our prices and what we offer on the “Register with us” page.

Why Getting Your Accounts Done Fast Matters
Getting your business accounts done early helps you plan for the future. If you get last year’s numbers too late, they won’t be as useful for making important decisions for the year ahead. Having your accounts early means you have more time to fix any mistakes and plan how to make more money.

We’ll Help You Understand Your Business
We love helping new clients who are confused by their business accounts. We believe that once you understand your accounts, they can be a great tool to help you run your business better. You can even meet with us in Dublin to get face-to-face help with your money and taxes.

Experiences and motives.

Starting a business can be confusing, especially with all the new words and rules about money. It’s really important to keep your taxes and paperwork in order so your business doesn’t get into trouble.

We’re Here to Help
You don’t have to do it alone. As experts, we’ll work with you to make sure you understand how to manage your business finances. We’ll teach you how to stay on track and even help you save money.

Our accountants have helped many companies that have missed deadlines or had to pay big fines. We want to help you avoid those problems so your business can do well right from the start.

Call or Click to Get Help
If you have any questions, our team is ready to talk to you. Just give us a call or click to get in touch. We can help you decide if you should be a sole trader or a limited company. This is a big choice, and we can help you make the best decision.

For example, a sole trader (a person who owns the business by themselves) can pay a lot of tax on what they earn, sometimes up to 42%. But a limited company only pays 12.5% tax on its earnings. A person we helped last year had to pay a lot of tax because they waited too long to start a limited company.

We can explain all the different options to you so you can make smart choices from the very beginning.

Protecting Yourself
When you create a limited company, it is its own separate thing. This means that if the business gets into debt, the company is responsible for it, not you personally. We can help you understand and lower the risks of starting a business.

Always talk to an accountant before making big money decisions for your business.

Client Survey

In March 2019, we asked our customers what they thought of our service. Most of them (89%) gave us a good score!

Here’s a breakdown of what they said:

We’re Worth It!
Value for Money: Our customers rated us an average of 9.3 out of 10 for being worth the money they spent.

Would Recommend Us: They rated us an average of 9.7 out of 10 for being a company they would tell their friends and family about.

We’re Good at What We Do
(On a scale of 1 to 5, with 5 being the best)

Getting Accounts Done: Customers rated us 4.3 for how fast we got their accounts done and for how easy the process was for them.

Tax Returns: They rated us 4.2 for how fast we did their tax returns and 4.4 for how easy the process was.

Payroll: They rated our payroll service 4.1 for being accurate and 4.9 for being easy to use.

Looking Ahead: Customers said that looking at their accounts with us helped them plan for the future, giving us a score of 4.0.

We’re Helpful
(On a scale of 1 to 5, with 5 being the best)

Helping Their Lives: Customers gave our advice an average of 4.6 for helping their personal life and 4.7 for helping their work life.

Good Value: They also said our advice was a good value, rating us a 4.0.

How to check if a tenancy is registered with the PRTB

You can check if a tenancy is registered with the PRTB by going to the Residential Tenancies Board and checking if it is registered.  You will need the Eircode of the property you are checking to see – you can use the address but it is not as reliable.

This is the link:

https://www.rtb.ie/check/index.html

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Bigtobz DaBarber profile picture
Bigtobz DaBarber
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Best accountant ever. The guys are the coolest people ever. Very forthcoming and understanding. If you want to have peace of mind with your business, OSA Mcquillan is the way to go! Eamon and Fahad are gents!
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Marion Fenton profile picture
Marion Fenton
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Eamon and team have been accountants for my small business for the last few years. They are always reliable, have given me excellent guidance over the years, and most importantly for me, there is always someone to pick up the phone when I call. I fully recommend them.
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Lara profile picture
Lara
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
I've always had a good experience with Eamon and his team, they are incredibly responsive, every time I reach out with a question or issue, they get back to me quickly with clear, helpful responses. I highly recommend them if you're looking for a reliable and professional accounting service! Thank you!
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Y Prospera profile picture
Y Prospera
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Very professional and nice people...
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furniture factory profile picture
furniture factory
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We are working with these guys in past 7 years and all I have to say is that they are the best in their job . So easy to communicate with them And they are on top of everything on time ! Five stars not enough really! Thanks guys
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Ambrose Klaric profile picture
Ambrose Klaric
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I had a horrifying experience with an accountant in Dublin, and as I was scouring the internet for a halfway decent one, a friend suggested Eamon and I am so glad they did. Eamon and his team are incredibly professional, but beyond that they are compassionate and genuinely interested in helping you with your business needs as well as helping you navigate the revenue system with comfort and ease. Thank you for all your work!
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Adam Elijah profile picture
Adam Elijah
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
OSA McQuillan provides us with an excellence service and are always very helpful with any additional queries requests we may have.
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Imran Butt profile picture
Imran Butt
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Eamon is very professional and Knowledgeable Accountant. We have been dealing with Eamon and his team since 2021 and found their work 100% at all times. Happy to recommend. Imran Butt
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