Allowable expenses, subcontractor and software costs, retainers, VAT, National Insurance and MTD explained for UK self-employed marketing consultants.
A self-employed marketing consultant sells judgement and time, which makes the tax picture look simple until the money starts moving. A typical year mixes monthly retainers with two or three agencies, fixed-price project work for direct clients, the odd performance bonus tied to a campaign, ad budgets recharged through your own card, and fees paid out to the designers, copywriters and developers you bring in to deliver. That mix of incoming retainers and outgoing subcontractor and platform costs is exactly where consultants either lose deductions they were entitled to or accidentally understate income.
This guide is built around how a marketing consultant actually earns and spends: how profit is taxed, the specific software, subcontractor and home-office costs you can claim, how recharged ad spend works, and the VAT and MTD thresholds that retainer income can quietly trip. Get the bookkeeping right as money moves and the annual return becomes a formality.
As a sole trader you pay Income Tax on profit, which is your total consultancy income minus allowable expenses. For 2025/26 the personal allowance covers the first GBP 12,570, then you pay 20% to GBP 50,270, 40% to GBP 125,140 and 45% above. The personal allowance tapers away between GBP 100,000 and GBP 125,140, creating an effective 60% band that a successful consultant can genuinely hit. Class 4 National Insurance is 6% on profit between GBP 12,570 and GBP 50,270 and 2% above, with Class 2 NIC settled through Self Assessment.
Scottish consultants pay Scottish Income Tax on their profit through six bands (19%, 20%, 21%, 42%, 45% and a 48% top rate) and carry an S-prefixed tax code, while National Insurance stays UK-wide. Welsh consultants have a C-coded tax code at rates currently matching the rest of the UK. If you also hold a part-time PAYE marketing role and your code looks wrong, run it through the tax code checker before it quietly over- or under-collects tax all year.
Plenty of consultants begin on the side, taking on a first client while still employed in-house. The GBP 1,000 trading allowance is built for that moment. If your gross self-employed income across all freelance work is GBP 1,000 or less in a tax year, it is tax-free and you do not need to register for Self Assessment for it. Cross GBP 1,000 and you must register and report the full amount.
Once over the threshold you get a yearly choice. Deduct the flat GBP 1,000 trading allowance instead of working out actual expenses, which suits a consultant with barely any costs, or deduct your real allowable expenses if they exceed GBP 1,000. You cannot do both. Because marketing work usually carries meaningful software and subcontractor costs, most established consultants beat the GBP 1,000 comfortably and claim actuals, but it is worth totalling both once a year and using the winner.
A consultant's return often pulls together several types of money, and they are not all taxed the same way. Use the multiple-income tax calculator to see how the streams stack on top of each other.
| Income type | How it is usually taxed | Watch out for |
|---|---|---|
| Monthly retainers | Self-employment trading income | The December retainer paid in January still belongs to the year you earned it |
| Fixed-price project fees | Trading income | Record the gross fee even when a client pays in instalments |
| Recharged ad spend | Trading income (the spend is a matching expense) | Report the recharge gross, deduct the platform cost |
| Performance or campaign bonuses | Trading income | Taxable when earned, not when the campaign "feels" finished |
| Affiliate or referral commission | Usually trading income | Often paid net of platform fees; record the gross |
| PAYE part-time marketing role | Employment income, taxed at source | Your tax code may already use your personal allowance |
| Workshop or speaking fees | Trading income | Travel to the event is deductible; ordinary commuting is not |
The classic error is treating recharged ad spend as if it were invisible. If a client reimburses you for GBP 4,000 of Meta or Google spend, that GBP 4,000 is taxable income and a matching deductible cost. Leave the income off and your figures will not reconcile with the platform invoices and the client's records.
An expense is allowable when incurred wholly and exclusively for the business. The consultant's list is dominated by software, subcontractor and home-office costs rather than heavy equipment.
| Expense | What qualifies | Notes |
|---|---|---|
| Computer and peripherals | Laptop, second monitor, webcam, mic, ergonomic chair and desk | Usually claimed in full via the Annual Investment Allowance |
| Software and SaaS | Analytics, SEO, design, email, social scheduling, CRM, project tools and AI assistants | Subscriptions are fully deductible business running costs |
| Recharged ad spend | Meta, Google, LinkedIn and TikTok ad budgets you fund and recharge | Deduct the spend, report the recharge as income |
| Your own advertising | Ads, sponsored content and lead-gen to win your own clients | Fully deductible |
| Stock and creative assets | Stock photos, video, music, fonts and templates used in client work | Deductible where used for the trade |
| Subcontractor fees | Designers, copywriters, developers and other freelancers you pay to deliver | Deduct what you pay them; keep their invoices |
| Home-office costs | HMRC flat-rate working-from-home allowance, or a fair proportion of heat, light, broadband, rent or mortgage interest | Choose the larger fair deduction |
| Website and hosting | Consultancy site, domain, hosting, portfolio and landing pages | Fully deductible running costs |
| Professional indemnity insurance | Cover for advice-based claims | Allowable and strongly advisable for consultants |
| Professional memberships | CIM, CIPR, IDM and similar bodies | Allowable where relevant to the trade |
| Travel and accommodation | Mileage, rail and hotels for client meetings, pitches and projects | Ordinary commuting and private trips are not allowable |
| Training and CPD | Courses that update existing marketing skills | Training into a brand-new trade is not allowable |
| Accountancy and bank fees | Bookkeeping, Self Assessment, business banking | Fully deductible |
These two lines are where consultants most often under-claim. Marketing runs on subscriptions, and a working consultant can easily carry GBP 2,000 to GBP 5,000 a year across analytics, design, SEO, email, scheduling, CRM and AI tools. Every one of those is a deductible running cost, so keep the receipts and tag them. Equally, when you bring in a freelance designer or developer to deliver part of a job, what you pay them is your deductible expense and their taxable income. Record the gross fee you invoice the client and deduct the subcontractor cost separately, rather than netting them off, so your turnover figure is accurate for the VAT and MTD thresholds.
Most consultants work from home between client visits, so home-office running costs are usually a meaningful deduction. Use HMRC's simplified flat rate based on hours worked at home each month, which needs no receipts, or claim an actual proportion of household costs (heat, light, broadband and a share of rent or mortgage interest) based on rooms used and time spent. For client visits and pitches, claim mileage at the HMRC approved rate (45p per mile for the first 10,000 business miles, then 25p) or actual vehicle running costs, but never ordinary commuting. Marketing is not a PPE trade, so there is no protective-clothing or tools-of-trade angle here, the value is in software, people and travel.
The private share of dual-use broadband, phone and devices must be excluded. Client entertainment, taking a prospect to lunch to win the account, is specifically not deductible for tax even though it is a real business cost. Everyday clothing is never allowable, even a smart outfit bought for a big pitch. And work done to set up your consultancy before you actually start trading is pre-trading expenditure, claimed once you begin rather than lost.
Take a home-based consultant with two agency retainers, several direct-client projects and some recharged ad spend, totalling GBP 62,000 of income for the year.
Income: GBP 62,000 (retainers GBP 36,000, project fees GBP 18,000, recharged ad spend GBP 8,000)
Allowable expenses:
Taxable profit: GBP 62,000 minus GBP 23,000 = GBP 39,000
Income Tax: GBP 39,000 minus GBP 12,570 = GBP 26,430 at 20% = GBP 5,286
Class 4 NIC: GBP 26,430 at 6% = GBP 1,586
Total tax and NIC: GBP 6,872 for the year. Note that the GBP 62,000 turnover is over the GBP 50,000 MTD threshold even though the profit is well under it, so this consultant is in scope for Making Tax Digital from April 2026. Run your own figures through the sole trader tax calculator to check what you should set aside.
For a marketing consultant, the recharged ad spend and the subcontractor invoices are where the return goes wrong. Record income gross, deduct the cost separately, and your turnover will actually be right when the VAT and MTD thresholds come knocking.
You must register for VAT once taxable turnover exceeds GBP 90,000 in any rolling 12-month period. A consultant on a few solid retainers can reach that faster than most freelancers, and because recharged ad spend counts towards turnover, the threshold can arrive sooner than the profit suggests. Watch the rolling figure month by month rather than waiting for the tax year to end. Because most marketing clients are VAT-registered businesses that reclaim the VAT you charge, registration is relatively painless and lets you reclaim VAT on software, equipment and ad spend. A consultant serving mainly small non-VAT clients, micro-businesses or sole traders should weigh the price impact before registering voluntarily, since they cannot reclaim what you add.
Making Tax Digital for Income Tax Self Assessment replaces the once-a-year return with quarterly digital submissions and a year-end finalisation. The thresholds are based on gross income, not profit:
For a consultant this matters more than for many trades, because retainer income inflates turnover. You can be comfortably profitable but still sail over GBP 50,000 of gross income, so check your turnover against the threshold, not your take-home. The upside is that recording each retainer, project fee and recharged cost digitally as it happens turns the quarterly summary into a near-automatic by-product of running the business. Our guide to MTD for sole traders walks through what the quarterly rhythm looks like in practice.
Netting off recharged ad spend. Report the gross recharge as income and deduct the platform cost separately, or your turnover will be understated for VAT and MTD.
Forgetting subcontractor fees as a deduction. Money paid to freelance designers, writers and developers is fully deductible, but only if you capture and keep their invoices.
Watching profit instead of turnover. The VAT and MTD thresholds key off gross income, and retainers can push you over while your profit still looks modest.
Claiming client entertainment. Lunches and hospitality to win or keep clients are real costs but specifically not deductible for tax.
Assuming the PAYE allowance covers consultancy too. If a part-time in-house role already uses your personal allowance, every pound of consultancy profit is taxed from the basic rate up.
Tax guide for Vinted sellers in the UK: trading vs selling personal items, the GBP 1,000 trading allowance, allowable expenses, the platform data HMRC now receives, VAT and MTD.
UK Airbnb tax guide: the GBP 7,500 Rent a Room scheme, the GBP 1,000 property allowance, the abolition of furnished holiday lettings, allowable expenses, VAT and MTD for landlords.
The complete UK tax guide for Uber drivers: gross fares, mileage claims, Uber service fees, VAT, and what MTD for Income Tax means for you.
UK eBay seller tax guide: selling personal items vs trading, the GBP 1,000 trading allowance, eBay fees, the platform reporting rules, VAT and MTD.
Tax guide for self-employed hairdressers: chair rent, allowable expenses, mileage, VAT and MTD for Income Tax explained in plain English.
Everything self-employed taxi and private-hire drivers need to know about tax, mileage vs actual costs, VAT, and Making Tax Digital in 2025/26.
TapTax connects to your bank, categorises expenses automatically, and submits quarterly updates to HMRC. Free plan, no card required.
