Welcome to OwnBoss.co.uk
Navigating the world of self-employment and running a business in the UK can be challenging. Still, you don't have to do it alone. Brought to you by the creator of PetrolPrices.co.uk and OnlyOne.co.uk, these tools are designed to be genuinely helpful, simple to use, and always free. Whether you're exploring a startup idea, need help with compliance, or looking to grow, we've curated resources to provide the support you need every step of the way.
Access OwnBoss on Your Phone
Get quick, app-like access to all our free tools by adding a shortcut to your phone's home screen. It's fast, free, and no app store is needed.
Learn HowMoney In
Free UK Invoice Generator
Generate clean, ad-free PDF invoices with your own logo—completely free and no sign-up required. With built-in VAT support, it's perfect for UK businesses. Download your invoice instantly, knowing all data remains private on your device. OwnBoss.co.uk does not store any information you enter.
Your Business Details
For your convenience, your business details are saved in your browser. They are not stored on our servers.
Recommended: Landscape logo (e.g. 400x100px). Max 2MB.
Client Details
Invoice Details
Invoice Items
Payment Terms
VAT
Money Out
Is It a Business Expense?
Type in an expense (e.g., "coffee with client", "laptop", "home internet") to see if it's typically tax-deductible.
Business Mileage Calculator
Uses HMRC's approved mileage allowance payments (AMAPs).
• Cars/Vans: 45p/mile for the first 10,000 miles, 25p thereafter.
• Motorcycles: 24p/mile.
• Bicycles: 20p/mile.
Official GOV.UK Rates
Calculate your tax-deductible mileage allowance based on HMRC's approved rates.
Pricing & Profit
Profit Margin Calculator
• Gross Margin: ((Revenue - COGS) / Revenue) * 100. Shows profit before overheads.
• Net Margin: ((Revenue - Total Expenses) / Revenue) * 100. Shows final profit after all costs.
Calculate your gross and net profit margins to understand business profitability.
Break-Even Point Calculator
Calculates the number of units you need to sell to cover your costs.
Formula: Fixed Costs / (Price Per Unit - Variable Cost Per Unit)
Find out how much you need to sell to cover all your business costs.
Sales Commission Calculator
Quickly calculate the commission earned on a sale.
Growth Metrics
Return on Investment (ROI) Calculator
ROI measures the profitability of an investment. It helps you decide whether a particular venture (like a marketing campaign or new equipment) is worth the cost.
Formula: ((Net Profit - Investment Cost) / Investment Cost) * 100
Calculate the return on investment to evaluate the efficiency of a business decision.
Customer Acquisition Cost (CAC)
CAC is the total cost of sales and marketing efforts needed to acquire a new customer. A lower CAC is better.
Formula: Total Marketing & Sales Cost / Number of New Customers
Calculate the cost to acquire a new customer for your business.
Customer Lifetime Value (CLV)
CLV predicts the net profit attributed to the entire future relationship with a customer. A high CLV is a sign of a healthy business with loyal customers.
Simple Formula: Avg. Purchase Value × Avg. Purchase Frequency × Avg. Customer Lifespan
Estimate the total revenue your business can expect from a single customer.
Burn Rate & Runway Calculator
• Burn Rate: The rate at which a company is spending its capital to finance overhead before generating positive cash flow.
• Runway: How many months your company can operate before it runs out of money.
Calculate how quickly your company is spending money and how long it can survive.
Inventory Turnover Ratio
This ratio shows how many times a company has sold and replaced its inventory over a given period. A higher ratio generally indicates strong sales.
Formula: Cost of Goods Sold / Average Inventory
Measure how efficiently your business manages its inventory.
Employee Turnover Rate
Calculate the percentage of employees who leave a company within a certain period. High turnover can be costly and indicate underlying issues.
Formula: (Employees Who Left / Avg. No. of Employees) * 100
Calculate your employee turnover rate to gauge workforce stability.
Tax
PAYE Salary & Take-Home Pay
Estimate your take-home pay after Income Tax and National Insurance deductions.
Uses standard tax code 1257L. Does not account for student loans, pensions or other deductions.
Self-Employed Tax Calculator
Estimate your UK Income Tax and National Insurance. For illustrative purposes only.
Note: From 2024/25, Class 2 NIC is no longer compulsory but can be paid voluntarily for pension credits.
Corporation Tax Calculator
Estimates tax for limited companies.
• 19% Rate: For profits up to £50,000.
• 25% Rate: For profits over £250,000.
• Marginal Relief: Applies to profits between these thresholds.
Estimate your UK Corporation Tax for a limited company.
Dividend Tax Calculator
Estimate the personal tax you'll pay on dividend income.
Assumes standard Personal Allowance. Does not account for complex tax situations.
Capital Gains Tax (CGT) Calculator
CGT is a tax on the profit when you sell an asset that has increased in value.
• Rates depend on your income tax band and the asset type. Residential property has higher rates.
• Annual Exempt Amount: You only pay tax on gains above this allowance.
Estimate the Capital Gains Tax on profits from selling a business asset.
Uses rates for standard assets (not residential property). Assumes full Annual Exempt Amount is available.
UK VAT Calculator
Quickly calculate VAT for invoices and expenses based on the standard 20% rate or a custom rate.
Late Payment Interest Calculator
This calculator determines the total amount due based on UK law:
• Statutory Interest: Calculated daily at 8% + the current Bank of England base rate.
• Compensation Fee: A one-off charge (£40, £70, or £100) based on the invoice value.
Calculate statutory interest and compensation on overdue commercial invoices.
Business & Home Broadband Deals
A reliable internet connection is essential. Below are exclusive deals and comparison tools to help you find the best value broadband.
Exclusive Small Business Deal
XLN Telecom is designed exclusively for UK small businesses, offering flexible contracts and low prices.
| Provider | Package | Speed | Price | Action |
|---|---|---|---|---|
| XLN Telecom | Onebill Business Broadband | Up to 1000Mbps | From £27.95 | Get Deal |
Note: XLN Telecom offers are exclusively for business customers. Check postcode and eligibility with the provider.
Compare All Broadband Deals
Not sure which provider is right for you? Use our comparison tool to check the latest deals from all major UK providers for business or home.
Compare Broadband DealsGetting Started & Registration
Understand your legal obligations and how to set up your business structure in the UK.
- GOV.UK: Set Up a Business Official guidance on business structures and registration.
Funding and Grants
Access finance to grow. Explore UK government schemes and funding opportunities.
- Start Up Loans Scheme Government-backed personal loans up to £25,000 for new businesses.
- Innovate UK Funding Funding for innovative projects and businesses.
- Find a Grant (GOV.UK) Official government grant search service.
Marketing Tools
Effectively promote your business to your target audience with these free tools.
- Google Analytics Track website traffic and user behaviour.
- Canva Create professional graphics and marketing materials.
- Mailchimp Manage email marketing campaigns.
Accounting & Finance
Keep track of your finances with helpful free tools, many compatible with UK tax rules.
- Wave Free accounting software for freelancers and small businesses.
- Zoho Books Free plan with invoicing and expense tracking.
Legal & Compliance
Understand your obligations and ensure your business complies with UK regulations.
- GOV.UK: Business Support Comprehensive government information and guidance.
- ACAS Free, impartial advice on employment law.
- Intellectual Property Office (IPO) Official body for patents, trademarks, and copyright.
Landlord & Property Resources
Professional tools and guidance for property entrepreneurs and landlords in the UK.
- Professional Tenancy Agreements Create legally compliant Assured Shorthold Tenancy (AST) agreements for residential properties.
Networking in the UK
Connect with fellow entrepreneurs, find mentors, and build valuable relationships.
- BNI (Business Network International) Structured referral marketing programme with local chapters.
- Federation of Small Businesses (FSB) Offers networking, support, and a powerful voice in government.
Business Training & Skills
Enhance your business acumen with free online courses and training programmes.
- Coursera Free courses from top universities worldwide.
- FutureLearn Access online courses from leading UK institutions.
- The Prince's Trust Enterprise Free training and mentoring for young UK entrepreneurs.
Essential Freelancer Tools
Streamline your workflow and manage your freelance business effectively.
- Toggl Track Simple time tracking to log hours for projects.
- Trello Flexible project management with boards and cards.
- Slack Communication platform for teams and clients.
Mental Health & Wellbeing
Running a business is demanding. Access free resources to support your mental health.
- Samaritans Free, confidential emotional support 24/7.
- Mind Information and support for mental health problems.
- NHS Mental Health Services Access free NHS support and talking therapies.
Additional Useful Resources
For those managing business vehicles or personal transport, check out our sister site, PetrolPrices.co.uk , where you can find the cheapest fuel prices in your local area. Saving on fuel costs can help boost your business's bottom line.
Disclaimer
The tools and calculators provided on OwnBoss.co.uk are for general informational and estimation purposes only and do not constitute financial, legal, accounting, or tax advice. All generated documents, including invoices and summaries, are intended as templates or guidance only. We do not guarantee their legal enforceability or suitability for your specific circumstances. Always review and customise documents as needed, and consult a qualified professional (such as an accountant or legal advisor) where appropriate. Tax laws and rates are subject to change; always refer to the latest official guidance from HMRC. Use of these tools is at your own risk.