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Visit UK Office Direct*Free Resources & Tools for UK Businesses
Running a business or going self-employed in the UK can be challenging — but you don't have to do it alone. Every tool on this page is genuinely free, simple to use, and runs entirely on your own device. Whether you're exploring a startup idea, staying on top of tax and compliance, or looking to grow, you'll find the support you need every step of the way.
From the creator of Own Boss — more free UK sites
Add Own Boss directly to your home screen. Skip the search engines and launch your business tools instantly—even when you're offline or on a job site. No app store needed.
Add to Home ScreenJump straight to any of our free UK business calculators and tools:
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.
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.
Create clean, ad-free PDF quotes and estimates to send to prospective clients — the same professional format as our invoice generator, with your own logo and optional VAT. It shares your saved business details with the invoice generator, and includes a valid-until date so prices don't stay open-ended. OwnBoss.co.uk does not store any information you enter.
Shared with the invoice generator above — details saved there appear here automatically. They are saved in your browser only, never on our servers.
Recommended: Landscape logo (e.g. 400x100px). Max 2MB.
Know another freelancer, contractor or small business owner who'd find these free tools useful? Share Own Boss in seconds with a QR code — perfect for networking events, your invoices, or a quick message.
Share via QR CodeType in an expense (e.g., "coffee with client", "laptop", "home internet") to see if it's typically tax-deductible.
Calculate your tax-deductible mileage allowance based on HMRC's approved rates.
Calculate your gross and net profit margins to understand business profitability.
Find out how much you need to sell to cover all your business costs.
Quickly calculate the commission earned on a sale.
Work out the day rate you need to charge to hit your target income, once holidays, non-billable time, expenses and pension are accounted for.
Based on 0 effective billable days a year — not the 260 weekdays an employee is paid for.
Rates are before Income Tax and National Insurance — use our Self-Employed Tax calculator to estimate those. For guidance only.
Calculate the return on investment to evaluate the efficiency of a business decision.
Calculate the cost to acquire a new customer for your business.
Estimate the total revenue your business can expect from a single customer.
Calculate how quickly your company is spending money and how long it can survive.
Measure how efficiently your business manages its inventory.
Calculate your employee turnover rate to gauge workforce stability.
Estimate your take-home pay after Income Tax and National Insurance deductions.
Uses standard tax code 1257L. Assumes the standard Personal Allowance with no £100,000 taper. Does not account for student loans, pensions or other deductions.
Thinking of hiring? See the true annual cost of an employee once employer National Insurance and pension contributions are added to their salary.
That's 0.0% on top of the salary. Use the PAYE card alongside this to see what the employee actually takes home.
Uses 2026/27 employer NI (15% above £5,000 a year). Excludes recruitment, equipment, training, holiday/sick cover, benefits and payroll costs. For guidance only — speak to an accountant before hiring.
Estimate your UK Income Tax and National Insurance. For illustrative purposes only.
Note: Class 2 NIC is no longer compulsory for most traders, though can be paid voluntarily for pension credits. Assumes the standard Personal Allowance with no £100,000 taper.
Estimate your UK Corporation Tax for a limited company.
Includes marginal relief for profits between £50,000 and £250,000 (standard 3/200 fraction — an effective 26.5% marginal rate in that band). Assumes a 12-month accounting period and no associated companies, which reduce these limits. For guidance only — speak to an accountant.
Estimate the personal tax you'll pay on dividend income.
Assumes standard Personal Allowance. Does not account for complex tax situations.
Director of a limited company? Compare taking a small salary plus dividends against taking it all as salary, and see which leaves more in your pocket.
Your salary (plus employer NI) is more than the available profit, so there's nothing left to pay as dividends.
Estimates use 2026/27 rates and assume: full profits extracted as dividends, standard Personal Allowance with no taper, no pension contributions, student loans or other income, and sufficient distributable reserves. Employer NI is 15% above £5,000. Corporation Tax uses the same estimate as our Corporation Tax calculator. For guidance only — speak to an accountant before deciding.
See which structure would leave more in your pocket at your level of profit, using 2026/27 rates.
Estimates use 2026/27 rates and assume: a tax-efficient £12,570 director's salary with all remaining profit extracted as dividends, standard Personal Allowance with no taper, no pension contributions, student loans or other income. Ignores accountancy costs (typically £600–£1,500 a year for a limited company), the extra admin burden and IR35 — these can flip the answer in marginal cases. For guidance only — speak to an accountant before deciding.
Estimate the Capital Gains Tax on profits from selling a business asset.
Uses current rates (18%/24%) for standard assets. Assumes full Annual Exempt Amount is available.
Quickly calculate VAT for invoices and expenses based on the standard 20% rate or a custom rate.
Calculate statutory interest and compensation on overdue commercial invoices.
Check if — and from when — you must follow Making Tax Digital for Income Tax, based on your combined gross income from self-employment and property.
Based on gross qualifying income (turnover and rents before expenses) — not profit — combined across all your self-employment and property income and tested per person. HMRC applies each threshold to the tax return filed just before the start year, and once mandated you stay in MTD until your income is below the threshold for three consecutive tax years. Exemptions and deferrals exist — check the latest HMRC guidance. For guidance only — speak to an accountant.
Earning on the side? Check whether the £1,000 trading allowance covers you — and if not, whether the allowance or your actual expenses gives the lower tax bill.
Your expenses exceed your income, so you'd make a loss. The trading allowance can never create a loss, so actual expenses is the route here — and loss relief may be available.
Work out the Income Tax and NI on that profit with our Self-Employed Tax Calculator.
The £1,000 trading allowance applies to your total trading income per person, per tax year — not per hustle — and you can't use both the allowance and actual expenses. A separate £1,000 property allowance exists for rental income. The trading allowance doesn't apply to income from your own limited company or a partnership. For guidance only — speak to an accountant.
Log your monthly VAT-taxable turnover and see your rolling 12-month total against the £90,000 registration threshold — with a projected crossing month if your trend continues.
Your figures stay in your browser and are never sent to or stored on our servers — clear them any time with the button above.
If you go over £90,000, you must register within 30 days of the end of the month you exceeded the threshold. A separate forward-look test applies if you expect to exceed £90,000 in the next 30 days alone. Taxable turnover includes standard, reduced and zero-rated sales but excludes exempt supplies. The deregistration threshold is £88,000. For guidance only — speak to an accountant.
Enter your incorporation date and see your next accounts, confirmation statement and Corporation Tax deadlines — then add them to the reminders strip at the top of the page with one click.
Dates assume a standard private limited company with no shortened or extended ARD changes. HMRC splits a long first accounting period into two Corporation Tax periods — the calculator shows the year-end based dates, so your first CT deadlines may differ slightly. Companies House and HMRC deadlines are legal obligations with automatic penalties — always verify against your Companies House record. For guidance only — speak to an accountant.
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Using these affiliate offers helps keep all Own Boss tools and resources free to use.
Browse office furniture, stationery, ink, filing and everyday workplace supplies.
Visit UK Office Direct*Find office essentials, paper, stationery, technology accessories and workplace products.
Visit Euroffice*Explore business laptops, monitors, printers, phones and other workplace technology.
Visit Currys Business*Check available business broadband and connectivity options for your workplace.
View Sky Business Deals*Explore CCTV cameras and security systems for offices, shops and other premises.
Visit ZOSI Security*Browse air purifiers, humidifiers, fans, vacuums and replacement filters.
Visit Levoit UK*Find hampers and gifts for thanking clients, welcoming new customers, rewarding staff or sending Christmas gifts.
View Business Gifts*Send flowers and gifts to recognise client milestones, thank customers or show appreciation to colleagues.
Visit Bunches.co.uk*Browse hand tools, power tools and accessories for tradespeople, workshops and business maintenance.
Visit Tooled Up*Shop stationery, paper, office furniture and everyday supplies for your workplace or home office.
Visit Office Stationery*Explore electricals and technology for offices, workspaces, staff facilities and home businesses.
Visit Hughes*Browse electricals and technology for business premises, meeting spaces, staff areas and home offices.
Visit PRC Direct*Find electronic components, tools and specialist supplies for technical, engineering and maintenance work.
Visit Rapid Online*Shop stationery, office supplies, furniture and practical essentials for businesses and home offices.
Visit Ryman*Compare mobile phones and deals for staying connected with customers, colleagues and suppliers.
Visit Mobiles.co.uk** Affiliate link. Own Boss may receive a commission if you make a purchase, at no extra cost to you. This support helps keep our tools free. See how Own Boss is funded.
Understand your legal obligations and how to set up your business structure in the UK.
Access finance to grow. Explore UK government schemes and funding opportunities.
Effectively promote your business to your target audience with these free tools.
Keep track of your finances with helpful free tools, many compatible with UK tax rules.
Understand your obligations and ensure your business complies with UK regulations.
Professional tools and guidance for property entrepreneurs and landlords in the UK.
Connect with fellow entrepreneurs, find mentors, and build valuable relationships.
Enhance your business acumen with free online courses and training programmes.
Streamline your workflow and manage your freelance business effectively.
Running a business is demanding. Access free resources to support your mental health.
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.
Yes. Every tool on OwnBoss.co.uk — including the invoice generator and all tax calculators — is completely free to use, with no sign-up, no account, and no hidden charges.
No. Everything you type stays on your own device. Optional features like saved invoice details and deadline reminders use your browser's local storage only — nothing is ever sent to or stored on our servers.
The tax calculators currently use the UK 2026/27 tax year rates and thresholds, and are updated each year when new rates come into effect.
Yes. The free invoice generator lets you add your VAT number and apply 20% VAT to your invoice with one click, then download it as a clean, ad-free PDF with your own logo.
Yes. Our free quote & estimate generator creates a professional PDF headed QUOTATION, with your logo, optional VAT, notes or terms, and a valid-until date (30 days by default) so your prices don't stay open-ended. It clearly states it isn't a VAT invoice or a demand for payment, and it shares your saved business details with the invoice generator.
Don't just divide a salary by 260 working days — employees are paid for holidays and sick days, and don't cover business costs. Instead, add your target income, expenses and pension together, then divide by your realistic billable days (working weeks × billable days per week — often around 184 rather than 260). Our free Freelance Day Rate Calculator does this for you and shows the equivalent hourly rate.
More than their salary. For 2026/27, employers pay 15% National Insurance on earnings above £5,000 a year, plus a minimum 3% auto-enrolment pension contribution — typically adding 15% or more on top of the gross salary, before recruitment, equipment and holiday cover. Our free Employer Cost Calculator shows the total annual cost and percentage uplift for any salary, including the effect of the Employment Allowance.
Many UK director-shareholders take a small salary (often around the £12,570 Personal Allowance) topped up with dividends, because dividends don't attract National Insurance. Our free Salary vs Dividend Optimiser compares your chosen mix against taking everything as salary using 2026/27 rates. Always confirm your own position with an accountant.
It depends mostly on your level of profit. Sole traders pay Income Tax and Class 4 National Insurance on all profits, while a limited company pays Corporation Tax and the director typically takes a small salary plus dividends. Our free Sole Trader vs Limited Company comparison shows the take-home for both structures at your profit level using 2026/27 rates. Remember a limited company also brings accountancy costs and extra admin, which can outweigh a small tax saving — always confirm with an accountant.
It depends on your combined gross income from self-employment and property — turnover and rents before expenses, not profit. Over £50,000, MTD for Income Tax became mandatory in April 2026, so you should already be following it. Over £30,000 you join from April 2027, and over £20,000 from April 2028. At £20,000 or under you're not currently caught and standard Self Assessment continues. Our free MTD for Income Tax Checker tells you your position and start date instantly.
Not if your gross trading income is £1,000 or under for the tax year — the trading allowance covers it and there's normally nothing to report. Over £1,000, you currently need to register for Self Assessment, and you can reduce your taxable profit by either the £1,000 allowance or your actual expenses, whichever is lower — never both. The government has announced the reporting threshold will rise to £3,000 with a simpler online service for smaller amounts, but this isn't in force yet. Our free Side-Hustle Trading Allowance Checker shows which option saves you more.
When your VAT-taxable turnover for the last 12 months goes over £90,000 — checked at the end of every month on a rolling basis, not your tax year. You then have 30 days from the end of that month to register with HMRC. You must also register if you expect to exceed £90,000 in the next 30 days alone. The deregistration threshold is £88,000. Our free Rolling 12-Month VAT Threshold Tracker keeps the running total for you in your browser and projects when you'd cross at your current run-rate.
For a private limited company, your first annual accounts are due 21 months after incorporation, and subsequent accounts 9 months after each accounting year-end. A confirmation statement is due 14 days after the end of each 12-month review period. Corporation Tax is paid 9 months and 1 day after the end of the accounting period, with the CT600 return due 12 months after. Our free Companies House Deadline Calculator works out your next dates and can add them to the reminders strip at the top of the page.
No. The calculators are for estimation and guidance only and don't constitute financial or tax advice. For your specific circumstances, always check the latest HMRC guidance or speak to a qualified accountant.
Step away from the numbers for a moment and recharge with something lighter before getting back to business.
Take a BreakThe 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.
Reminder tools are provided for convenience only and do not guarantee the accuracy or completeness of any deadlines.