SliQ Invoicing – What You Need to Know
An in-depth look at SliQ Invoicing — features, strengths, limitations, and who it's best for.
At a Glance
Key facts about SliQ Invoicing at a glance.
| Feature | SliQ Invoicing |
|---|---|
| Software Type | Desktop Invoicing Application (Windows) |
| Target Users | Self-Employed, Small Businesses (trades, services) |
| Income Sources Supported | Self-Employment only (property not supported) |
| Free MTD Software Plan | Free trial (paid licence: £54.99/year) |
| MTD Quarterly Updates to HMRC | Yes |
| Final Declaration | No |
| Bank Reconciliation | No |
| Automated Bank Feeds | No |
| Invoice Creation | Yes |
| 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 | No |
| Spreadsheet Import/Export | No |
| Platform | Windows desktop application, Server mode, Online/cloud version |
| GDPR Compliant | Yes |
What Is SliQ Invoicing?
What Is SliQ Invoicing?
SliQ Invoicing is a Windows desktop invoicing application developed by SliQTools, a UK software company based in Shrewsbury, Shropshire, that specialises in business software for small to medium-sized companies. SliQ's primary function is creating and tracking professional invoices, credit notes, purchase orders, delivery notes, quotes, and customer statements. It also lets users record supplier bills and track payments, with stock control features for inventory management. The software includes a customisable template editor for designing invoice layouts with logos, graphics, and custom fields.
SliQ Invoicing is HMRC-recognised for both MTD for VAT and MTD for Income Tax. For VAT, SliQ provides a wizard that steps users through authorising the software, viewing VAT obligations, and submitting VAT returns directly to HMRC. For MTD ITSA, SliQ supports quarterly submissions to HMRC for self-employed people — however, end-of-year submissions (Final Declaration) and property businesses are not currently supported. This is a critical limitation for landlords: SliQ cannot be used as standalone MTD software for rental property income.
Strengths
- HMRC-recognised for MTD ITSA (quarterly self-employment updates)
- HMRC-recognised for MTD for VAT (full VAT return submission)
- Strong invoicing with customisable templates, quotes, credit notes
- Includes stock control and purchase orders
- Records supplier bills and tracks business expenditure
- Client/server mode for multi-user shared access
- One-time annual fee of £54.99/year — no monthly subscription
- Domestic VAT Reverse Charge and Northern Ireland Protocol support
- Established product with positive user testimonials
Limitations
- Property income NOT supported for MTD ITSA
- Final Declaration / end-of-year submissions NOT supported
- Windows desktop only — no web, iOS, or Android access
- No bank feeds, no open banking, no automated reconciliation
- No AI-powered features, no OCR receipt capture
- No property portfolio management, tenant tracking, or rent tracking
- No chart of accounts, no journal entries, no formal P&L
- No agent filing on behalf of landlord clients
- No cloud storage — data stored locally on Windows PC
Making Tax Digital Compliance
How SliQ Invoicing Handles MTD for Sole Traders (Not Landlords)
SliQ Invoicing is HMRC-recognised for MTD ITSA but with significant limitations. The platform supports quarterly submissions to HMRC for self-employed people only. Property businesses are not currently supported — meaning landlords cannot use SliQ to submit quarterly updates for rental income. Additionally, SliQ does not support end-of-year submissions (the Final Declaration that replaces the traditional Self Assessment tax return). Users must continue to use a bookkeeper or accountant for end-of-year submission. SliQ provides an easy-to-use wizard for the quarterly submission process: authorising SliQ to submit on your behalf, viewing obligations from HMRC, reviewing cumulative income and expense figures, and submitting them. For MTD for VAT, SliQ provides full support including viewing obligations, calculating VAT on sales and purchases, and submitting VAT returns.
| Feature | SliQ Invoicing |
|---|---|
| HMRC Recognised (MTD ITSA) | Yes |
| MTD Quarterly Updates | Yes |
| Final Declaration | No |
| Digital Record Keeping | Yes |
| Digital Links Compliant | Yes |
| Sole Trader Income | Yes |
| UK Property Income | No |
| Foreign Property Income | No |
| Multiple Income Streams | No |
| Agent Filing on Behalf | No |
Property Management
SliQ Invoicing: No Property-Specific Features
SliQ Invoicing does not offer any property-specific features. There is no property portfolio management, no tenant management, no rent tracking, no per-property expense allocation, no joint ownership automation, no HMO support, and no compliance document alerts. SliQ is designed for businesses that invoice customers for goods and services — not for managing rental property portfolios. Even if a landlord wanted to use SliQ for basic record keeping, the software cannot submit property income to HMRC under MTD.
| Feature | SliQ Invoicing |
|---|---|
| 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
SliQ Invoicing: Invoice and Bill Tracking with Sales vs Expenditure Reports
SliQ Invoicing provides digital record keeping through its invoicing and billing system. Users raise invoices for income, record supplier bills for expenses, and track customer payments. Bill items can be categorised to see where money is being spent. The software provides reports on sales, payments, customers, and suppliers, giving a view of business performance including sales versus expenditure. However, SliQ does not offer a chart of accounts, journal entries, double-entry bookkeeping, bank reconciliation, automated bank feeds, or open banking integration. All data entry is manual — there is no way to automatically import bank transactions.
| Feature | SliQ Invoicing |
|---|---|
| Cash Basis Accounting | |
| 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 | No |
| Xero Integration | No |
| Spreadsheet Import/Export | No |
| Digital Record Storage | Yes |
Invoicing, Expense Tracking
SliQ Invoicing: Full-Featured Invoicing with Template Editor
SliQ Invoicing is a dedicated invoicing platform with extensive capabilities. It offers multiple customisable invoice templates with a built-in template editor for adding logos, graphics, text, and custom fields. Users can create invoices, quotes/estimates, credit notes, purchase orders, delivery notes, and customer statements. The software supports recurring invoices for automated monthly billing, email templates for sending invoices with formatted HTML, and PayPal button integration for faster payment. Stock control features help track inventory levels with a reorder wizard. However, SliQ has no AI-powered features, no OCR receipt capture, no automated expense categorisation, and all data entry is manual.
| Feature | SliQ Invoicing |
|---|---|
| Invoice Creation & Sending | Yes |
| Invoice Customisation/Branding | Yes |
| Online Payment Collection | Yes |
| Payment Tracking/Reminders | Yes |
| Expense Tracking | Yes |
| Receipt Capture (OCR/Photo) | No |
| Expense Categorisation | Yes |
| Automated Transaction Matching | No |
| Mileage Tracking | No |
| AI Auto-Categorisation | No |
Reporting & Tax Forecasting
SliQ Invoicing: Sales and Business Performance Reports
SliQ Invoicing provides numerous reports on sales, payments, customers, and suppliers. Users can view a summary of their business including sales versus expenditure, which provides a basic view of business performance. Custom reports can be created. However, SliQ does not produce formal profit & loss reports, balance sheets, trial balances, or per-property financial breakdowns. There is no real-time dashboard and no tax forecasting capability.
| Feature | SliQ Invoicing |
|---|---|
| Profit & Loss Report | No |
| Balance Sheet | No |
| Trial Balance | No |
| Dashboard/Overview | No |
| Real-Time Financial Data | No |
| Cash Flow Reporting | No |
| Tax Estimate/Forecast | No |
| AI-Powered Features | No |
Collaboration & Mobile Apps
SliQ Invoicing: Windows Desktop with Client/Server Mode
SliQ Invoicing is a Windows desktop application — it runs only on Windows PCs and has no web browser access, no iOS app, and no Android app. Data is stored locally on your hard drive. However, SliQ does offer a client/server mode that allows multiple users to work on the same company data simultaneously, sharing invoice templates and attachment data. This is useful for small businesses with multiple staff members who need to raise invoices. SliQ does not offer an accountant portal or agent filing. Support is available via email only; there is no phone support.
| Feature | SliQ Invoicing |
|---|---|
| Accountant/Advisor Portal | No |
| Multi-User Access | Yes |
| Agent Filing on Behalf | No |
| Bank Integration | No |
| Platform | Windows desktop application, Server mode, Online/cloud version |
| Web Browser Access | No |
| FCA Regulated | No |
| GDPR Compliant | Yes |
Ease of Use, Support & Security
SliQ Invoicing's Ease of Use
SliQ Invoicing emphasises simplicity — users can produce their first invoice within minutes with no special accounting knowledge needed. The software uses wizard-based interfaces for MTD submissions, stepping users through each stage clearly. Customer testimonials praise SliQ's intuitive design and ease of flow. Support is available via email only (sales@sliqtools.co.uk). SliQ stores data locally on your Windows PC with no cloud backup — users are responsible for their own data backups. The optional client/server mode allows shared access on a local network.
| Feature | SliQ Invoicing |
|---|---|
| Phone Support | No |
| Chat Support | No |
| Email Support | Yes |
| Help Centre/Knowledge Base | Yes |
| FCA Regulated | No |
| Enterprise-Grade Security | No |
Unique Features Only SliQ Invoicing Offers
MTD for VAT with Full Return Submission
SliQ is HMRC-recognised for MTD for VAT, with a wizard-guided process for viewing obligations, calculating VAT from sales and purchases, and submitting VAT returns directly to HMRC. The platform supports Domestic VAT Reverse Charge, Postponed VAT Account, and Northern Ireland Protocol requirements.
Quotes, Estimates & Credit Notes
SliQ creates professional quotes and estimates for potential customers, which can be converted to invoices. Credit notes can be issued for returns or adjustments. These are essential for trades businesses but not typically needed by landlords.
Purchase Orders & Delivery Notes
SliQ generates purchase orders for suppliers and delivery notes for shipments — features designed for product-based businesses and tradespeople.
Stock Control with Reorder Wizard
SliQ includes inventory tracking with stock level monitoring and a wizard to identify and reorder low stock items. This is valuable for businesses selling physical products but irrelevant for landlords.
Customisable Invoice Template Editor
SliQ's template editor allows users to modify invoice layouts with logos, graphics, text, custom fields, and column configurations. Multiple templates can be saved for different document types.
Recurring Invoices for Automated Billing
SliQ supports automated recurring invoices for regular monthly billing — useful for subscription businesses or regular service providers.
Client/Server Mode for Local Network Sharing
SliQ allows multiple users on the same local network to access and work on company data simultaneously. This is useful for small offices with multiple staff members raising invoices.
Who Should Choose SliQ Invoicing?
SliQ Invoicing is the better choice for:
Self-Employed Tradespeople Who Need Professional Invoicing
If you're a builder, decorator, plumber, electrician, or other tradesperson who needs to create professional invoices, quotes, credit notes, and track customer payments, SliQ's dedicated invoicing features are comprehensive and well-designed. The customisable template editor lets you create branded documents that match your business identity.
Product-Based Small Businesses Needing Stock Control
If you sell physical products and need to track inventory levels, SliQ's stock control features with the reorder wizard are a genuine advantage that most MTD-focused platforms do not offer.
VAT-Registered Sole Traders Needing MTD for VAT
SliQ provides full MTD for VAT support including Domestic Reverse Charge and Northern Ireland Protocol. If your primary need is VAT return submission alongside invoicing, SliQ covers both.
Self-Employed Sole Traders with Simple MTD ITSA Needs
If you're self-employed (not a landlord), have straightforward income and expenses, and only need to submit MTD quarterly updates — with your accountant handling the end-of-year Final Declaration — SliQ can serve as your in-year MTD tool.
Businesses That Prefer Desktop Software Over Cloud
If you prefer to keep data on your own computer rather than in the cloud, and you work exclusively on Windows, SliQ's local installation with optional server sharing may appeal.