---
title: "Business Tax Services in Cardiff for SMEs | HLS Accounts"
description: "Clear business tax advice in Cardiff. We plan ahead, keep filings accurate and on time, and support you with HMRC so you only pay what you owe."
canonical: "https://hlsaccounting.co.uk/service-categories/tax-services-business"
---

# Tax Services - Business

Get your business tax sorted with clear advice, accurate calculations, and support with HMRC. We help you plan ahead, meet deadlines, and claim the reliefs you are entitled to, so there are fewer surprises.

Business tax can feel like a moving target, especially when you are busy running day to day. Our business tax services give you a clear plan, reliable numbers, and support if HMRC gets in touch. We start by understanding how your business works and reviewing your records, then map out key deadlines and likely payments. You will get practical guidance on what to keep, what you can claim, and what to do next, with regular check-ins as your business changes and grows.

![Advisor pointing to financial documents and a tablet during a startup consultation while the founder takes notes across a desk in a clean office.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fadvisor_startup_consultation_realistic_studio.jpg%3Fv%3D1773064219790&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)

![Business professional receives a refund or reduced tax payment from a tax advisor across a desk with an open box of patent documents, calculator, and blank tax forms in a clean office meeting room.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Ftax-refund-patent-ip-office-photo.png%3Fv%3D1773064242140&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)![A financial advisor points at investment paperwork on a clean desk while a client listens attentively in a modern office, with a laptop, calculator, pen, folder, and smartphone visible.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Ffinancial_advisor_client_consultation_realistic_studio_photo.png%3Fv%3D1773064215309&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)

-   ![Advisor pointing to financial documents and a tablet during a startup consultation while the founder takes notes across a desk in a clean office.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fadvisor_startup_consultation_realistic_studio.jpg%3Fv%3D1773064219790&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)
    
    ## SEIS (Seed Enterprise Investment Scheme) Advice
    
    SEIS advice for early-stage limited companies raising seed funding. Confirm eligibility, prepare HMRC advance assurance, and complete investor paperwork after the share issue.
    
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    [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting)[View Service](/services/seis-seed-enterprise-investment-scheme-advice)
    
-   ![A financial advisor points at investment paperwork on a clean desk while a client listens attentively in a modern office, with a laptop, calculator, pen, folder, and smartphone visible.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Ffinancial_advisor_client_consultation_realistic_studio_photo.png%3Fv%3D1773064215309&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)
    
    ## Enterprise Investment Scheme (EIS) Advice
    
    Support for growing companies raising funds under the Enterprise Investment Scheme: eligibility checks, HMRC advance assurance, share issue paperwork and investor EIS certificates.
    
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    [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting)[View Service](/services/enterprise-investment-scheme-eis-advice)
    
-   ![Business professional receives a refund or reduced tax payment from a tax advisor across a desk with an open box of patent documents, calculator, and blank tax forms in a clean office meeting room.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Ftax-refund-patent-ip-office-photo.png%3Fv%3D1773064242140&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)
    
    ## Patent Box Tax Relief
    
    Claim Patent Box Tax Relief to reduce Corporation Tax on profits from patented inventions. We handle eligibility checks, calculations, elections and CT600 filing.
    
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    [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting)[View Service](/services/patent-box-tax-relief)
    
-   ![A small business owner and an accountant review asset purchases and paperwork at a desk in a clean office, with the accountant pointing to documents and a calculator while the owner looks relieved.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fbusiness_owner_accountant_assets_desk.jpg%3Fv%3D1773064220104&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)
    
    ## Tax Relief on Business Assets (AIA)
    
    Claim Annual Investment Allowance (AIA) on qualifying equipment, fit-outs and vans. We check eligibility, calculate capital allowances and include the claim in your return.
    
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    [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting)[View Service](/services/tax-relief-on-business-assets-aia)
    
-   ![Tax advisor and concerned client in a modern UK office reviewing financial documents across a desk, calm but tense investigative mood.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Ftax-advisor-client-uk-office-enquiry.png%3Fv%3D1773064218119&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)
    
    ## HMRC Enquiry & Investigation Support
    
    Support with HMRC enquiries and investigations, from the first letter to the final outcome. We organise records, manage deadlines, and deal with HMRC on your behalf.
    
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    [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting)[View Service](/services/hmrc-enquiry-and-investigation-support)
    
-   ![Business owner and accountant seated at a desk reviewing tax documents with a laptop and calculator in a modern office.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fbusiness_owner_accountant_tax_planning_realistic_studio_photo.png%3Fv%3D1773064236572&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)
    
    ## Business Tax Planning
    
    Plan ahead for Corporation Tax or Self Assessment, forecast what you will owe, and use allowances, expenses and profit extraction sensibly.
    
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    [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting)[View Service](/services/business-tax-planning)
    
-   ![Scientist and finance professional collaborate at a desk with a chart tablet and blank tax documents in a modern lab-finance office.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fresearch_finance_collaboration_studio_photo.png%3Fv%3D1773064219514&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)
    
    ## R&D Tax Credits
    
    Claim R&D Tax Credits without the stress. We confirm eligibility, calculate qualifying costs, write the supporting report, and submit the claim with your Corporation Tax return.
    
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    [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting)[View Service](/services/randd-tax-credits)
    
-   ![Business professionals around a conference table reviewing tax documents with laptop charts, calculator, and calendar in a modern office.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fbusiness_tax_meeting_realistic_studio.jpg%3Fv%3D1773064216883&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)
    
    ## Corporation Tax Planning
    
    Get a clear estimate of your company’s corporation tax, plan director pay and spending, and avoid nasty surprises at year end with practical, plain-English advice.
    
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    [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting)[View Service](/services/corporation-tax-planning)
    
-   ![Accountant at a desk using a laptop and calculator while reviewing corporate tax documents in a clean office.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Faccountant_corporation_tax_return_studio_photo.png%3Fv%3D1773064208310&w=1536&q=75&dpl=dpl_DEc4fGhEc1SCRZZutzoEsRuDy1CJ)
    
    ## Corporation Tax Returns
    
    CT600 and iXBRL preparation and filing for limited companies, with clear tax calculations, allowance checks, and deadline tracking so you stay compliant and avoid surprises.
    
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    [Book a free consultation](https://calendly.com/hlsaccounting/new-client-meeting)[View Service](/services/corporation-tax-returns)
    

## Frequently Asked Questions

What results should I expect from business tax services?

You should expect clearer tax forecasts, fewer last-minute scrambles, and confidence that filings are accurate and on time. The aim is to reduce risk, improve cash flow planning, and make sure you only pay what you owe under the rules.

What do you need from me to get started?

We will ask for your bookkeeping records, bank statements, details of income and costs, and copies of recent submissions or HMRC letters. If anything is missing, we will tell you what matters most and help you get it into shape.

Can you deal with HMRC on my behalf?

Yes, we can handle communication with HMRC as part of the overall tax support, keeping you informed in plain English. You will know what is being asked, what we are responding with, and what the likely next steps are.

How often should my business tax position be reviewed?

At least once a year, but growing businesses often benefit from checking in during the year too. Reviewing before big changes, like new equipment, hiring, or a busy trading period, helps avoid surprises and supports better decisions.

Will you explain things in plain English and keep me updated?

Yes, we keep it practical and jargon-free, with clear actions and timelines. We will explain what the numbers mean, what to do next, and flag upcoming deadlines early so you stay in control.