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The Making Tax Digital Spreadsheet Specialists

We offer Spreadsheet/Excel MTD bridging software.

Used by Top 15 Accountancy Firms to Bookkeepers - FTSE PLCs to Window Cleaners.

Sage and Quickbooks compatible
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How we started

Hi, my name is Peter Hamilton; I am the founder of 123 Sheets. I am a Chartered Accountant and a Chartered Tax Adviser. Until recent years, I ran my own successful accountancy firm employing staff with an office just off Guildford High Street.

During my years in practice, I found Microsoft Excel to be a versatile spreadsheet software programming platform on which to build a variety of products, including bookkeeping packages that are often faster and more reliable than other online or desktop bookkeeping packages.
With the advent of Making Tax Digital, I wanted my accountancy clients to be able to continue using Microsoft Excel, so I founded 123 Sheets to do that. Since 123 Sheets become highly successful for many tens of thousands of businesses and accontancy firms around the world, I decided to sell my accountancy practice, concentrating on 123 Sheets and have not looked back since!

I hope you enjoy our software; we work very hard to ensure it is: secure, easy to use and fit for purpose. This is what we are known for and why we are so highly recommended to others by existing business owners and accountancy firms who rave about our software.
Peter Hamilton

Testimonials

I’ve filed thousands of VAT Returns so far on 123 Sheets for clients, and I have found it efficient, simple and easy to use.
BR Pusser & Co
123 Sheets testimonial
I’ve filed thousands of VAT Returns on 123 Sheets for clients, and I have found it efficient, simple and easy to use.
BR Pusser & Co
123 Sheets testimonial
I looked at various software, but found this the simplest and easiest. I’ve filed hundreds of VAT Returns now, I never needed any instructions.
All Paul Ltd
123 Sheets testimonial
Many thanks for your endless patient help with MTD registrations. I hope you don't mind but I have recommended your software to quite a number of clients.
Martin Seitler & Co
123 Sheets testimonial
I’ve filed thousands VAT Returns on 123 Sheets for clients, and I have found it efficient, simple and easy to use.
BR Pusser & Co
123 Sheets testimonial
I looked at various software, but found this the simplest and easiest. I’ve filed hundreds of VAT Returns now, I never needed any instructions.
All Paul Ltd
123 Sheets testimonial
Many thanks for your endless patient help with MTD registrations. I hope you don't mind but I have recommended your software to quite a number of clients.
Martin Seitler & Co
I looked at various software, but found this the simplest and easiest. I’ve filed hundreds of VAT Returns now, I never needed any instructions.
All Paul Ltd
123 Sheets testimonial
I tried other bridging software, and gave up in despair! I then found 123 Sheets which I found simple and easy to file my VAT Return
Trusted Floor Solutions Ltd
123 Sheets testimonial
The software looked so easy, I suspected fraud. My accountant told me you are legitimately approved by HMRC. I’ve now filed my first VAT Return with ease.
Abbey Pet Foods
123 Sheets testimonial
I feel smug that I have filed my first VAT Return with 123 Sheets, and haven’t had to pay hundreds to one of the larger software providers.
Saxtead Livestock Ltd
123 Sheets testimonial
I’ve now filed my first VAT Return. They helped me register for MTD when I was struggling: excellent service
Stock Solutions Ltd
123 Sheets testimonial
The system is very easy to use, I filed our VAT Return without needing any support.
BJ Chemists Ltd
123 Sheets testimonial
Customer Services was exceptional, I was quickly able to file my VAT Return with their help
Unsworth Family Stores
123 Sheets testimonial
I tried other bridging software, and gave up in despair! I then found 123 Sheets which I found simple and easy to file my VAT Return
Trusted Floor Solutions Ltd
123 Sheets testimonial
The software looked so easy, I suspected fraud. My accountant told me you are legitimately approved by HMRC. I’ve now filed my first VAT Return with ease.
Abbey Pet Foods
123 Sheets testimonial
I feel smug that I have filed my first VAT Return with 123 Sheets, and haven’t had to pay hundreds to one of the larger software providers.
Saxtead Livestock Ltd
123 Sheets testimonial
I’ve now filed my first VAT Return. They helped me register for MTD when I was struggling: excellent service.
Stock Solutions Ltd
123 Sheets testimonial
The system is very easy to use, I filed our VAT Return without needing any support
BJ Chemists Ltd
123 Sheets testimonial
Customer Services was exceptional, I was quickly able to file my VAT Return with their help
Unsworth Family Stores

What is ‘Making Tax Digital’?

HM Revenue & Customs wants to cut its costs, reduce errors, get paid quicker and bring its systems and those of taxpayer businesses into the digital age.

HM Revenue & Customs believes the software industry is better suited to assist businesses bring their affairs into the digital age, so quarterly filing will need to be submitted to HMRC via HMRC-recognised third-party software such as 123 Sheets. From April 2026 HM Revenue & Customs will require sole traders and landlord businesses to keep their bookkeeping on software (eg: Microsoft Excel) and make quarterly submission of income and expense summary totals via HMRC-recognised third-party software, where their gross income was over £50,000 in the prior tax year.

Those of turnover between £30,000 to £50,000 start from April 2027. HM Revenue and Customs has not yet announced dates for those with lower turnovers or partnerships. VAT-registered persons and entities must already keep digital bookkeeping and make regular digital submissions of data to HMRC using third-party software. We estimate that Corporation Tax will come into Making Tax Digital after 2030. 123 Sheets will of course have software ready for affected companies and partnerships when the time comes.
What does MTD mean?

We take your Data Security seriously.

We work with external data security and cyber security experts who regularly perform penetration tests on our servers and undertake ISO27001 audits (as well as Cyber Essentials Plus testing) then advise us accordingly, which we implement.

We encrypt all data transferred between you, us and HMRC.

When you upload your data to us, we only read your summary figures HMRC needs. We do not use or store any of your underlying financial data.

We do not see or store any of your credit card details. For your annual licence payment, you are re-directed to Pay360 (owned by Capita), a banking facility that partners with WorldPay. Once payment is made, you are re-directed back to our website. WorldPay is the largest card payment facility provider in the UK.
We store very limited information about you. All historic filing data, future filing obligations listed, HMRC tax estimates, payments and liability information shown on our website all come from HMRC's server each time, we do not store these. We store: contact name, business name, e-mail address, National Insurance Number, VAT Number and your phone number.

The servers we use are kept in a secure UK-based data centre, controlled by the largest web hosting company in Europe. Our servers use enterprise level Microsoft operating systems and database software, as well as the latest anti-virus and anti-intrusion blocking software. The database and website is backed up daily. Remote server access is restricted to administrators having unique hand-held security devices. Remote server access security is provided by Cisco Systems, a company listed on the NASDAQ stock exchange.

So as you can see, we take very, very seriously your data security concerns.
Data security assured

FAQ’s

What is ‘Making Tax Digital’?
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There are two basic elements to this:

1. You must keep your bookkeeping, through to the digital filings, on software (eg a spreadsheet). You cannot do it in ledger books/paper anymore;
2. If your bookkeeping software doesn’t have a facility for you to file digital sumbissions to HMRC, you will need bridging software. This is what we provide.

What Data do you Send to HMRC?
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We extract out of your spreadsheet the summary figures to be sent to HMRC. HMRC do not get your spreadsheet. We do not keep anything you upload to us.

Are Spreadsheets only a Temporary Solution for MTD?
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No, our software has been approved by HM Revenue & Customs for long-term use to accept spreadsheets.

Don’t get sucked in by the tales of some software providers that spreadsheets are only a temporary solution.

How Do I Insert The 123 Sheets Worksheet Into My Spreadsheet?
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Watch this video:


or follow these steps:

1. Ensure you have both spreadsheets open on Excel: our worksheet and your bookkeeping spreadsheet;
2. Then, click on "View" then "View Side-by-Side". You should now see both spreadsheets at the same time: one above, one below on the same page;
3. Now pick up by the tab and drop either our worksheet into your spreadsheet, or vice versa to finish.

Failing that, you do not need to merge our worksheet into yours. You could instead keep the two spreadsheets separate, and use a formula to move your summary HMRC figures to our spreadsheet and just upload that.

Is Your Software Compatible With Older Versions of Microsoft Excel?
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Our software is compatible with Microsoft Excel 1997 through to the latest versions. However, if you have chosen to use our bookkeeping spreadsheet, you'll need Excel 2016 or higher.

Don’t I need to Put My Business Details in The Spreadsheet?
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No. In order to file a Return, you will set up an account with us and enter there those details there. When filing a Return to HMRC, we send those details and your figures to HMRC, so we do not need to ask you for them each time you submit a Return.

I Don’t Have Excel, Do You Work With Other Spreadsheet Software?
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Yes. Please click on the relevant software link below to see how to do it

.Google Sheets
Apple Numbers
Libre Office
Open Office

If your software is missing from the above list, let us know what it is and we’ll get back to you.

Do you Work with Sage, Quickbooks and Other Bookkeeping Software?
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Yes, just export your summary data to Excel, and we can submit your data to HMRC. We have a specific VAT solution for Sage and Quickbooks users on our VAT page. As long as your software allows you to export the Return into Excel or a .csv file, you can use our software. If it will only export a PDF, you can use a free PDF converter on the internet to convert your file into an Excel file. We are looking to increase the number of automatic imports for different software. If your software isn’t listed, get in touch, and we may be able to provide an automatic import facility for you within a week or so.

Do you Work with Different VAT Schemes?
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Yes, we work with all VAT Schemes.

FRS, Groups, Partial Exemption, Capital Goods, Margin Schemes, Cash Accounting, Annual Scheme, Retail Schemes, Payments on Account etc can all use our software.Just ensure the figures on your return are calculated correctly according to your scheme rules and are put in the correct boxes as per the rules for your VAT scheme. (Eg: on the FRS, Box 6 is the Gross Sales (inc. VAT), and Box 1 is your FRS % multiplied by your box 6 figure – other boxes are normally zero).

What Kind of Businesses do you Work With?
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We work with all sizes of businesses, organisations and individuals.

How do I Purchase Your Software?
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Create an account with us. Do that by clicking on “Create Account” near the top of this page. Then log in to your account and select the ‘Purchase’ link.

Can I Try This Software Before Buying?
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Yes, you can use one of our Demos.

There are various Demo buttons on pages across this website, just not on this page.

Do you keep my Data Secure?
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Yes, we have a section above dedicated to that entitled “We Take Your Data Security Seriously”. Please read that.

How Much Does it Cost?
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You will find on each specific tax page a pricing section.

How Do I File My EC Sales List?
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EC Sales Lists are not yet part of Making Tax Digital, so file those however you were filing them previously.

VAT

Unfortunately HM Revenue & Customs is allowing
entry into ITSA MTD by invitation only at this time.

Click Here to be notified when you can set up an ITSA MTD account