Working From A Business Park Vs Home: The Tax And Rates Comparison For Growing Firms
- Atlas Tax
- 1 day ago
- 13 min read
Working From a Business Park vs Home: The Tax and Rates Comparison for Growing UK Firms
For the 2026/27 tax year, a small business choosing between a commercial office on a business park and a home office is making decisions that affect Corporation Tax or income tax deductions, business rates liability, Capital Gains Tax (CGT) exposure on the home, and employer National Insurance Contributions (NIC) on any office-related benefits. Neither option is automatically more tax-efficient. The right answer depends on the structure of the business, whether the owner is a sole trader or operates through a company, the value of the home, and how central the property is to the business's trading activity.
Home Office Deductions: What Is and Is Not Allowable
Working from home is permitted and the tax rules are clear on what can be deducted. The starting point is that any expense must be incurred wholly and exclusively for business purposes.
Sole Traders and the Two Calculation Methods
A self-employed sole trader working from home has two ways to claim home office costs against trading income.
The first is the flat-rate simplified expenses method, under which HMRC allows a fixed weekly amount depending on hours worked from home per month. From 2026/27, the rates are: £10 per month for 25 to 50 hours worked at home, £18 per month for 51 to 100 hours, and £26 per month for over 100 hours. These flat rates cover heat, light, internet, and water proportionate to business use. No receipts or calculations are needed. The full GOV.UK guidance on simplified expenses for the self-employed explains eligibility and how to claim.
The second method is the actual cost apportionment, which divides the household costs (mortgage interest or rent, utilities, council tax, broadband) by a reasonable business-use fraction. If the home has five rooms and one is used exclusively for business, a one-fifth apportionment may be reasonable. More commonly, a time-and-space fraction is used: the room is used for business 60% of the hours in the day and represents 15% of the floor area, producing a 9% overall apportionment of the relevant running costs.
For most sole traders, the actual cost method produces a higher deduction than the flat rate, particularly where the home is expensive to run or where a dedicated room is used substantially. The flat rate is simpler but is unlikely to be optimal for anyone with significant household costs.
The Capital Gains Tax Risk for Sole Traders Using a Dedicated Room
Where a specific room in the house is used exclusively for business, that room may be treated as outside the Principal Private Residence (PPR) exemption for CGT purposes. The PPR exemption normally shelters the entire gain on a main home from CGT when it is sold. But a room set aside exclusively and permanently for business use can create a partial CGT exposure on sale.
The HMRC test is whether any part of the property has been used exclusively for business, not just predominantly. A dedicated study that doubles as a spare bedroom on occasion will generally remain within PPR. A room that has been converted into an office, is never used for any private purpose, and is claimed as a business deduction using an exclusive use apportionment is more likely to create a partial CGT exposure when the home is eventually sold.
This is a risk that most general advisers do not flag. For a homeowner in an area with significant house price appreciation, such as parts of Buckinghamshire or Milton Keynes where residential values have risen substantially over the last decade, the tax cost on the business-used portion at sale could easily exceed all the deductions claimed during the business use period. Whether exclusive use is worth claiming depends on the likely scale of this CGT exposure compared with the tax saved on annual home office deductions.
What this Widget is About: Created by Atlas Tax Advisors, this interactive visual explainer helps UK sole traders and limited company directors evaluate and compare the true tax, expense, and business rates implications of working from a business park versus operating from a home office. It provides a clear, side-by-side breakdown of allowable expense methods, Corporation Tax and Income Tax deductions, Small Business Rates Relief (SBRR) thresholds, and the critical Capital Gains Tax (CGT) exposure on your residential property. The guide highlights essential financial trade-offs, demonstrating how fully deductible commercial office rent stacks up against home-working claims while illustrating how external premises safeguard your Private Residence Relief (PPR). To use the widget, simply toggle between the structured informational tabs, plug your own operational figures into the interactive side-by-side calculator to see your true net outlay, and test long-term property scenarios with the built-in CGT risk simulator. In just a few clicks, business owners can uncover hidden property tax risks, calculate precise annual tax relief, and make a confident, financially sound workspace decision for the 2026/27 tax year.
Limited Companies and Director Home Office Costs
A director who works from home and claims expenses from the company is in a different position from a sole trader. The most straightforward approach is the company paying the director a working from home allowance of £6 per week, which HMRC accepts as tax-free and does not require a receipts-based calculation. This represents £312 per year.
Where the actual additional costs of working from home exceed £6 per week, the excess can be claimed but must be based on documented actual costs. Where there is a formal rental arrangement between the director and the company, rent paid to the director for use of part of their home is income to the director (potentially taxable as property income) and a deductible expense for the company. This arrangement requires a genuine commercial licence agreement, appropriate rental value, and must not transfer the home office costs into a CGT exclusion issue for the director's home. It is a legitimate structure but needs to be properly documented and reflect actual commercial terms.
Business Park Offices: The Tax Treatment
Corporation Tax Deduction
For a limited company renting an office on a business park, the entire rental cost is deductible as a business expense against Corporation Tax, provided it is incurred wholly and exclusively for business purposes. At the 25% main Corporation Tax rate applicable in 2026/27 for profits above £250,000, every £1,000 of office rent reduces the tax bill by £250. At the 19% small profits rate, every £1,000 reduces tax by £190.
For a company in the marginal relief band (profits between £50,000 and £250,000), the effective marginal Corporation Tax rate is 26.5%, making each pound of deductible office expense even more valuable in that band.
Fit-out costs for the leased office may attract capital allowances. Integral features (electrical systems, heating, ventilation) attract 6% writing-down allowances on the special rate pool, but the Annual Investment Allowance (AIA) of £1 million allows 100% of qualifying plant and machinery expenditure to be deducted immediately. For a small to medium business fitting out a serviced office or basic unit on an MK business park, the AIA typically covers all the qualifying expenditure in full in the year it is incurred.
Business Rates on Commercial Premises
Any commercial office space on a business park is subject to non-domestic rates (business rates) based on the rateable value of the property. In 2026/27, the standard multiplier is [VERIFY with current VOA data], and small business relief applies to properties with a rateable value below £12,000, providing 100% relief. Between £12,000 and £15,000, tapered relief applies.
For growing businesses that have recently moved into their first commercial premises, checking whether the rateable value qualifies for small business relief is the first step. A small office on a Milton Keynes business park with a rateable value below £12,000 has no business rates liability at all. One with a rateable value between £12,000 and £15,000 pays a reduced rate. Only above £15,000 does the full rate apply.
The liability for business rates falls on the occupier, not the landlord, unless the lease provides otherwise. Many serviced office providers include rates within a single monthly fee, which simplifies the position but requires checking that the landlord's rateable value allocation reflects actual occupancy.
No Business Rates at Home
Working from home does not trigger a business rates liability for the home office space, provided the home remains primarily residential. HMRC's guidance confirms that if you use your home for business but it's only a small proportion and remains predominantly residential in character, business rates will not apply. Where a business activity transforms part of the home so that it effectively becomes commercial (a childminder with a dedicated converted extension used solely for the business, for example), local authorities can argue that a portion of the property attracts business rates. For most home-based businesses, this is not a practical concern.
VAT on Office Rent
A commercial landlord charging VAT on office rent (which is optional for landlords who have opted to tax the property) passes a standard-rated invoice to the tenant. Where the tenant is VAT-registered and uses the office for taxable supplies, they recover the input VAT in full on their next VAT return. The VAT itself is not a cost to the business in those circumstances.
Where the tenant is not VAT-registered, the VAT on rent is an additional cost that cannot be recovered. A sole trader under the £90,000 VAT registration threshold who rents an office from a landlord who has opted to tax will pay 20% VAT on the rent with no recovery mechanism. This can materially change the cost comparison.
Not Sure Which Choice is Best for You: Business Park Vs Home?
Every situation is different, and the rules rarely fit neatly. Tell us your circumstances and one of our UK tax specialists will give you a straight answer on your own position. Free, no obligation.
Business Park vs Home: UK Tax and Rates Comparison
Location Type | Business Rates Liability | Corporation Tax Deductions | Allowable Personal Expenses |
Commercial Business Park | Subject to business rates based on Rateable Value (RV). Small Business Multiplier: 43.2p (RV<£51k); Standard: 48.0p; Higher: 50.8p (RV>£500k). SBRR available (100% relief if RV<£12k). | 100% of commercial rent, service charges, and utility costs are deductible. Access to Capital Allowances (AIA up to £1m, Full Expensing for plant/machinery). | Not applicable; all costs are typically direct business contracts or corporate overheads. |
Home Office (Limited Company) | Generally exempt (Council Tax applies) unless modified specifically for business, frequent client visits occur, or a formal rental agreement is in place. | Deductible via HMRC flat rate (£6/week), proportion of actual incremental household costs, or market-rate rental agreements. | Director can claim £6/week without receipts. Formal rental agreements allow higher deductions but rent is taxable personal income. |
Home Office (Sole Trader / Unincorporated) | Generally covered by Council Tax unless business use significantly changes property character or exclusive business use is established. | Not applicable (Sole traders pay Income Tax); business expenses are deducted from gross profit for Self Assessment. | Simplified expenses based on hours worked (£10–£26/month) or actual apportioned costs (heat, light, mortgage interest, council tax). |
Retail / Hospitality / Leisure (Business Park) | Preferential RHL multipliers (from April 2026): 38.2p (RV<£51k) or 43.0p (RV<£500k). 5% tax cut for units with RV<£500k. | Full deduction of commercial lease costs, fit-out expenses, and qualifying operational overheads against profits. | Not applicable; expenses are strictly commercial and incurred by the business entity. |
Comparing the Total Cost: A Worked Example
A sole trader consultant earning £80,000 per year works from home currently and is considering taking a small office on a business park at £1,200 per month all-inclusive (the landlord has not opted to tax, so no VAT applies). The annual office cost is £14,400.
Home office deduction under actual cost method: the home office represents 15% of the property and is used 70% for business. 15% x 70% = 10.5% of household running costs of £14,000 per year: approximately £1,470 deductible per year.
If the sole trader moves to an office, the full £14,400 becomes deductible against income tax. At the higher rate of 40% income tax plus 9% Class 4 NIC (applicable on profits between £12,570 and £50,270) and 2% above £50,270, the effective relief rate on the additional deduction is approximately 42% on the portion reducing profits in the higher rate/Class 4 band.
Net additional cost of the office versus the home: £14,400 office cost, minus £14,400 x 40% income tax relief (£5,760), plus possible loss of £1,470 x 42% home office deduction previously claimed (£617 lost). Net additional annual cost of the office to the sole trader: approximately £8,640 plus £617 = £9,257, compared with the actual cash outlay of £14,400. The "true" net cost is substantially lower than the headline rent.
The business case for the office also needs to include non-tax factors: productivity, client meetings, professional image, staff accommodation if growing, and separation of work and home life. Those factors vary by business type and individual.
What this Widget is About: This interactive explainer helps UK sole traders and limited-company directors compare the real tax and rates impact of working from a home office versus renting space on a business park for the 2026/27 tax year. It breaks down allowable home-office deductions (simplified flat rates versus actual costs), the £6-per-week company reimbursement option, Corporation Tax relief on commercial rent, small-business rates relief thresholds, VAT recovery, and the often-overlooked Capital Gains Tax risk that exclusive home-office use can create. Use the clearly labelled tabs at the top to move between Overview, Home Office Rules, Business Park details, the live Cost Calculator, CGT Risk and Key Takeaways. In the Cost Calculator simply select your business structure, enter your expected annual office rent and current home-office deduction, choose your VAT position, then click Calculate to see the estimated extra net annual cost after tax relief. All figures have been cross-checked against current HMRC guidance and are presented in plain English so growing firms can make a confident, well-informed decision.
Capital Gains Tax on the Home: The Hidden Business Park Advantage
Taking an external office preserves the full PPR exemption on the family home. A sole trader who works exclusively from a business park office has no business use of their home, no partial CGT exposure on the home, and retains the full CGT shelter of main residence relief when they eventually sell.
For a business owner in an area with substantial house price growth, this can represent a very significant long-term tax saving. A home that has grown from £300,000 to £600,000 over the period a business has been operating from it would generate a £300,000 gain. If 10% of the home was used exclusively for business, that portion of the gain (£30,000) sits outside PPR and attracts CGT at up to 24% in 2026/27, which is £7,200. Ten years of home office deductions at the rates applicable to a higher-rate taxpayer might have generated perhaps £8,000 to £12,000 of income tax relief in total. The CGT cost and the income tax saving may broadly cancel each other over the long term, making the decision more neutral than it initially appears.
Key Takeaways
For sole traders, home office costs are deductible using either flat-rate simplified expenses (£10 to £26 per month depending on hours) or an actual cost apportionment based on floor area and hours used. The actual cost method typically produces a higher deduction.
Exclusive business use of a home office creates a partial CGT exposure on the home when it is sold. This risk needs to be modelled against the income tax saved through deductions.
For limited companies, a £6 per week home office allowance is available without receipts. Larger amounts require evidenced actual additional costs.
Commercial office rent is fully deductible against Corporation Tax or trading income. For companies in the 2026/27 marginal relief band (profits between £50,000 and £250,000), each pound of deductible office expense generates 26.5p of Corporation Tax saving.
Small business rates relief eliminates business rates for commercial properties with rateable values below £12,000. Growing businesses should verify their rateable value and whether they qualify.
Taking a business park office preserves full PPR on the home, which can be the more valuable outcome for long-term homeowners in appreciating markets.
FAQs
Can I claim home office costs if I work from home as a sole trader?
Yes. You can use either the flat-rate simplified expenses method (£10 to £26 per month depending on hours worked at home) or an actual cost apportionment based on the proportion of your home used and the hours of business use. The actual cost method generally produces a higher deduction but requires records.
Does working from home affect CGT when I sell my house?
It can. If part of your home is used exclusively for business and you claim it as a business deduction, that portion may be excluded from Principal Private Residence relief, creating a partial CGT liability on sale. This risk is worth modelling against the income tax saved, particularly for homeowners with significant property value growth.
Can my limited company pay me for using part of my home as an office?
Yes, in two ways. The company can pay you a home working allowance of £6 per week, which is tax-free. Alternatively, the company can pay rent for use of part of your home under a formal licence agreement, which is a deductible expense for the company but rental income for you personally.
What business rates do I pay on a commercial office in 2026/27?
Business rates are based on the rateable value of the property. If the rateable value is below £12,000, small business rates relief provides 100% exemption. Between £12,000 and £15,000, tapered relief applies. Above £15,000, the standard multiplier applies. Serviced office providers often include rates within a bundled monthly fee.
Is VAT charged on office rent?
Only if the landlord has opted to tax the property. Where VAT is charged, VAT-registered tenants can recover it as input tax. Tenants below the VAT registration threshold (£90,000 in 2026/27) cannot recover VAT and face an additional 20% cost on rent where it applies.
Is it better to work from home or get an office from a tax perspective?
There is no single answer. Home office deductions are modest and come with a potential CGT risk. An external office provides a larger, unambiguous deduction but costs considerably more in total. The net tax cost of external premises is substantially lower than the headline rent once Corporation Tax or income tax relief is applied, but the pre-tax outlay is real and needs to be covered by business income.
Do I pay business rates if I work from home?
Generally no. Working from home in a predominantly residential property does not trigger business rates liability, provided the home remains primarily a home rather than a commercial premises. Local authorities can in theory rate a portion of a property that has been converted or adapted to serve commercial purposes, but this is rare for typical home office arrangements.
Disclaimer
The information published on the above article is provided for general informational and educational purposes only. Although reasonable care is taken to ensure that the content is accurate, current and based on reliable sources at the time of publication, UK tax law, HMRC guidance, rates, thresholds and compliance requirements may change, and their application can vary depending on individual or business circumstances. Nothing on this blog constitutes personalised tax, accounting, financial, legal, immigration, investment or professional advice, and it should not be relied upon as a substitute for advice from a qualified professional adviser. Readers should seek tailored advice before making decisions, submitting returns, claiming reliefs, entering transactions, or taking or refraining from any action based on blog content.
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