123 Sheets – What You Need to Know
An in-depth look at 123 Sheets — features, strengths, limitations, and who it's best for.
At a Glance
Key facts about 123 Sheets at a glance.
| Feature | 123 Sheets |
|---|---|
| Software Type | Web-Based Bridging Software |
| Target Users | Landlords, Sole Traders, Accountants |
| Income Sources Supported | Sole Trader + UK Property |
| Free MTD Software Plan | No |
| MTD Quarterly Updates to HMRC | Yes |
| Final Declaration | Yes |
| Bank Reconciliation | No |
| Automated Bank Feeds | No |
| Invoice Creation | No |
| Receipt Capture (OCR) | No |
| Expense Auto-Categorisation | No |
| Property Portfolio Management | No |
| Tenant Management | No |
| Joint Ownership & Profit Sharing | No |
| Payroll | No |
| HMO Unit-Level Tracking | No |
| HMRC SA105 Box Pre-Mapping | Yes |
| Spreadsheet Import/Export | Yes |
| Platform | Web browser only |
| GDPR Compliant | No |
What Is 123 Sheets?
What Is 123 Sheets?
123 Sheets is a web-based Making Tax Digital bridging platform founded by accountant Peter Hamilton specifically to help spreadsheet users meet HMRC's digital submission requirements without abandoning their existing workflows. It is one of the most established and highly reviewed bridging tools in the UK market, having already processed submissions for over 35,000 VAT businesses and earning a five-star average from more than 1,900 Trustpilot reviews. The platform holds ISO 27001 and Cyber Essentials Plus security certifications and is HMRC-recognised for both MTD for VAT and MTD for Income Tax (ITSA).
123 Sheets takes a guided approach to bridging. Rather than requiring users to map their own spreadsheet cells to HMRC fields — as some competitors do — it provides pre-formatted Excel, Google Sheets, LibreOffice, and Apple Numbers templates with income and expense categories already matched to HMRC's required categories. Users enter their data into the template and upload it to the 123 Sheets website for submission. Alternatively, users of Sage, QuickBooks, or other accounting packages can export their profit and loss report to Excel and upload that file directly, meaning 123 Sheets is compatible with virtually any existing bookkeeping system.
Strengths
- HMRC-recognised for MTD VAT and MTD ITSA
- Excellent Trustpilot rating — 5 stars from 1,900+ reviews
- Pre-formatted landlord and sole trader spreadsheet templates
- Web-based — works on any browser, any device, any OS
- Compatible with Excel, Google Sheets, Sage, QuickBooks, LibreOffice, Numbers
- Per-taxpayer licence covers all income sources (sole trader + property)
- ISO 27001 and Cyber Essentials Plus certified
- Very low annual cost — £19.75 + VAT per taxpayer
- Accountant portal with To Do and Deadline tracking
- Demo available free before purchasing
Limitations
- Bridging only — does not create or maintain digital records
- No property management, tenant management, or rent tracking
- No bank feeds or automated transaction matching
- No AI categorisation, OCR receipt capture, or invoice creation
- No formal accounting reports (P&L, balance sheet, trial balance)
- No phone support — email and online only
- No free plan for live submissions (demo only)
- Interface described as functional but dated by some reviewers
- Foreign property income support not confirmed for ITSA
- No mobile app — browser-based only
Making Tax Digital Compliance
How 123 Sheets Handles MTD Compliance
123 Sheets is HMRC-recognised for MTD for Income Tax, supporting sole trader income and UK property income for quarterly updates and final declarations. The platform provides pre-formatted spreadsheet templates with HMRC income and expense categories already matched, eliminating the need for users to configure their own cell mappings. Users upload their completed spreadsheet to the 123 Sheets website, where it is validated and transmitted to HMRC. Critically, 123 Sheets does not create or maintain the underlying digital records — that responsibility remains with the user in their spreadsheet. The per-taxpayer licensing model means a single licence covers a client with both self-employment and property income, with all their required submissions appearing on a single To Do dashboard.
| Feature | 123 Sheets |
|---|---|
| HMRC Recognised (MTD ITSA) | Yes |
| MTD Quarterly Updates | Yes |
| Final Declaration | Yes |
| Digital Record Keeping | Yes |
| Digital Links Compliant | Yes |
| Sole Trader Income | Yes |
| UK Property Income | Yes |
| Foreign Property Income | No |
| Multiple Income Streams | Yes |
| Agent Filing on Behalf | Yes |
Property Management
123 Sheets: No Property Management Features
123 Sheets has no property management functionality. It does not track tenancies, manage rent, record compliance deadlines, allocate expenses to individual properties, or provide any landlord-specific workflows beyond its pre-formatted income and expense templates. All property administration must be managed in separate software or spreadsheets. For landlords who simply need a tool to submit their existing spreadsheet records to HMRC, this is a deliberate design choice that keeps the platform simple and affordable.
| Feature | 123 Sheets |
|---|---|
| Property Portfolio Management | No |
| Tenant Management | No |
| Rent Tracking | No |
| Property Expense Allocation | No |
| Multiple Property Support | No |
| HMO Property Support | No |
| Joint Ownership/Profit Sharing | No |
| Maintenance Tracking | No |
| Tenant Screening | No |
| Compliance Document Alerts | No |
| Arrears Tracking | No |
Bookkeeping, Accounting & Digital Record Keeping
123 Sheets: Structured Templates, No Bookkeeping Engine
123 Sheets does not perform bookkeeping functions in the traditional sense, but it does provide a meaningful layer of structure for spreadsheet users through its pre-formatted templates. These templates have income and expense categories already matched to HMRC's required categories, include ledger-style reports, handle disallowable expenditure, and produce profit reports per self-employment unit for those with multiple business activities. Users of Sage, QuickBooks, and other accounting software can export their profit and loss report to Excel and upload it directly, without needing to re-enter data. However, 123 Sheets does not provide bank feeds, journal entries, a chart of accounts, or automated reconciliation.
| Feature | 123 Sheets |
|---|---|
| Cash Basis Accounting | Yes |
| Chart of Accounts (Pre-built, Landlord-Tailored) | No |
| Journal Entries | No |
| Bank Reconciliation | No |
| Automated Bank Feeds | No |
| Open Banking Integration | No |
| Double-Entry Bookkeeping | No |
| HMRC Box Pre-Mapping | Yes |
| Xero Integration | No |
| Spreadsheet Import/Export | Yes |
| Digital Record Storage | No |
Invoicing, Expense Tracking
123 Sheets: No Expense Tracking or Invoicing Features
123 Sheets takes no active role in expense management. As a bridging submission tool, it does not record, categorise, or process any individual expense data — that work is entirely the responsibility of the user in their spreadsheet, prior to uploading. There are no automation features, no receipt scanning, and no invoice creation capabilities. The pre-formatted templates do provide HMRC-matched expense categories as a structural guide, which helps users ensure their records are organised correctly before submission — but the data entry itself is entirely manual.
| Feature | 123 Sheets |
|---|---|
| Invoice Creation & Sending | No |
| Invoice Customisation/Branding | No |
| Online Payment Collection | No |
| Payment Tracking/Reminders | No |
| Expense Tracking | No |
| Receipt Capture (OCR/Photo) | No |
| Expense Categorisation | Partial |
| Automated Transaction Matching | No |
| Mileage Tracking | No |
| AI Auto-Categorisation | No |
Reporting & Tax Forecasting
123 Sheets: Template-Level Reporting, No Formal Accounting Reports
123 Sheets does not produce formal standalone accounting reports from within the platform. However, its own spreadsheet templates do include ledger reports, profit summaries per self-employment unit, and disallowable expenditure handling — providing a level of financial visibility that goes beyond a basic submission form. For landlords who already use Sage or QuickBooks, the underlying software will continue to generate their full financial reports; 123 Sheets simply handles the HMRC transmission layer. The platform does not produce tax estimates, portfolio dashboards, or investment analysis of any kind.
| Feature | 123 Sheets |
|---|---|
| Profit & Loss Report | Partial |
| Balance Sheet | No |
| Trial Balance | No |
| Dashboard/Overview | Yes |
| Real-Time Financial Data | No |
| Cash Flow Reporting | No |
| Tax Estimate/Forecast | No |
| AI-Powered Features | No |
Collaboration & Mobile Apps
123 Sheets: Accountant-First Design with Per-Taxpayer Licensing
123 Sheets was designed with accountants in mind from the outset, and its agent features reflect that priority. The dedicated agent login provides access to a To Do page listing all client submissions ordered by due date, a Deadline tracking system, and historic submission records — all without requiring the landlord to log in or action anything themselves. The per-taxpayer licensing model is a significant practical advantage for accountancy practices: a single licence covers all of a client's income sources, whether self-employed, a landlord, or both, avoiding the per-business charges that some competitors apply. The platform is web-based, meaning it works on any device with a browser — though there is no dedicated mobile app.
| Feature | 123 Sheets |
|---|---|
| Accountant/Advisor Portal | Yes |
| Multi-User Access | Yes |
| Agent Filing on Behalf | Yes |
| Bank Integration | Yes |
| Platform | Web browser only |
| Web Browser Access | Yes |
| FCA Regulated | No |
| GDPR Compliant | No |
Ease of Use, Support & Security
123 Sheets: Simple Web Interface with Strong Security Credentials
123 Sheets is consistently praised by users for its simplicity and speed. The three-step submission workflow — enter data in the template, upload the spreadsheet, submit to HMRC — is described by many reviewers as taking only a few minutes per quarter. The web-based interface requires no installation, works on any device with a browser, and has been refined over years of VAT submissions. Some reviewers note the interface looks functional rather than modern, but the overwhelming consensus across 1,900+ Trustpilot reviews is that it does exactly what it promises with minimal friction. Customer support is available via email and online, but there is no phone support. On the security side, 123 Sheets holds ISO 27001 and Cyber Essentials Plus certifications alongside GDPR compliance — security credentials that exceed those of many competing bridging tools.
| Feature | 123 Sheets |
|---|---|
| Phone Support | No |
| Chat Support | Yes |
| Email Support | Yes |
| Help Centre/Knowledge Base | Yes |
| FCA Regulated | No |
| Enterprise-Grade Security | No |
Unique Features Only 123 Sheets Offers
Per-taxpayer licensing for accountants
A single licence covers all income sources for one client (sole trader + property), regardless of how many businesses or properties they have. Competitors often charge per business entity, making 123 Sheets significantly more cost-effective for practices managing mixed-income clients.
Pre-formatted HMRC-matched templates for multiple platforms
Ready-to-use spreadsheet templates for Excel (1997+ and 2010+), Google Sheets, Apple Numbers, LibreOffice, and OpenOffice — covering both landlord and sole trader income. Users can adopt the 123 Sheets template or link their own existing spreadsheet.
MTD for VAT — established and proven
123 Sheets has been submitting VAT returns for over 35,000 businesses since MTD for VAT launched.
Sage and QuickBooks compatibility
Users of Sage 50, QuickBooks, and similar accounting software can export their profit and loss report to Excel and upload it directly to 123 Sheets, preserving existing workflows.
ISO 27001 and Cyber Essentials Plus certification
123 Sheets holds independently verified security certifications that go beyond standard GDPR compliance — relevant for accountancy practices with data security obligations.
Accountant-oriented To Do and Deadline dashboard
A dedicated agent view listing all clients' outstanding submissions ordered by due date, with historic records — purpose-built for practices managing multiple MTD clients efficiently.
Free demo before purchasing
Prospective users can try a full single-taxpayer demo before committing to a paid licence, reducing purchasing risk.
Who Should Choose 123 Sheets?
123 Sheets is the better choice for:
Landlords and sole traders who already use spreadsheets.
If your records are well-organised in Excel, Google Sheets, LibreOffice, or a similar application, 123 Sheets provides the cheapest and simplest path to MTD compliance without rebuilding your workflow.
Existing Sage or QuickBooks users
Export your profit and loss report from your accounting software to Excel, upload it to 123 Sheets, and submit — no additional data entry, no software migration.
Accountants managing large volumes of mixed-income clients
The per-taxpayer licence covers all income sources for each client under one National Insurance number. This is significantly more cost-effective than per-business pricing models for practices with many mixed-income clients.
VAT-registered landlords and sole traders
123 Sheets has a well-proven MTD for VAT offering used by 35,000+ businesses. If you already use it for VAT, staying with the same platform for ITSA reduces complexity and cost.
Users who prioritise independently verified security
ISO 27001 and Cyber Essentials Plus certifications are particularly relevant for accountancy practices with data protection obligations.
Landlords seeking a low-cost interim or permanent compliance solution
At £19.75 + VAT per year (with introductory discounts available), 123 Sheets is one of the most affordable HMRC-recognised MTD options available for any landlord or sole trader.