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Specialists in Tax Rebates for the Construction Industry

NJB TAXBACK offers a revolutionary one-stop solution to filing your self-assessment tax return that’s guaranteed against HMRC investigation.

Our service combines the expertise of our qualified, friendly team with our free App to supercharge the process of completing your end-of-year tax return.

  • 14-Day average completion time

  • Guaranteed against HMRC investigation

  • Fees tailored to your requirements

If you think you might be due a tax refund, download the NJB TAXBACK App and use our FREE rebate calculator to check.

A Simple Process

Get in touch

Download our free App and try our rebate calculator before signing up, or skip straight to signing up and book a call-back for a free consultation at your convenience.

Submit your information

We support bank statements, QuickBooks, emails or good old fashioned pen and paper. Whatever you prefer.

Sit back and relax

We aim to prepare all accounts for submission within 14 days. If you are due a refund, this will be paid directly into your bank account.

NJB TAXBACK combines a large corporation’s resources with the values of a small family-run business

NJB TAXBACK can offer your business an industry-leading bespoke accountancy service tailored to your specific requirements.

Here are just a few of the things we do best at NJB TAXBACK.

Free No obligation consultation

We offer a free 20-minute phone consultation to assess your business’s requirements and provide you with a free no-obligation quote.

Fees tailored to your business’s requirements:

We ensure your business is not overpaying for accountancy but still receives the support it needs and the freedom to contact us without fearing hidden charges.

14-day average completion time

We will transfer your tax rebate directly to your bank account for instant payment, if you are entitled to a tax rebate.

Guaranteed Against Investigation

We guarantee your tax return against HMRC investigation, and it’s a proper guarantee.

Qualified Accountants & Bookkeepers

We are QuickBooks Certified ProAdvisors, and our extended team includes Qualified Accountants & Bookkeepers.

Recover Lost Records

We can assist in recovering any missing records and liaise with contractors/employers on your behalf to resolve any issues.

Get in touch with us today to find out more

Get in Touch


The NJB TAXBACK App is the only tool your business needs and puts our 13 years of experience and expertise in the palm of your hand.

The NJB TAXBACK App supercharges the process of completing your end-of-year tax return, massively reducing your time waiting for an accountant’s response, and most importantly, saves your business money.

The NJB TAXBACK App is instantly accessible, never has a day off and will always be free.

Download the free NJB TAXBACK App now to get started, and use our free rebate calculator to check if you are due a tax refund.

What our FREE App can do for you

Reduce worrying

Our rebate calculator can help you check if you are due a tax refund.

Reduce wondering

Our tax return progress tracker is live and gives you 24/7 complete control of our processes and next steps.

Reduce missed messages

Our App notifications and messages ensure you’ll receive our updates, regardless of the phone number, device or platform you prefer to use.

Reduce searching

Our document portal securely stores all your financial records in one place, including handily prepared mortgage bundles.

Reduce late filing penalties

Our reminders ensure you won’t miss a deadline.

Reduce waiting

Our appointment scheduling lets you book a call at your convenience in 10 seconds.

Reduce Admin

Our tap to confirm buttons reduces your admin and a single tap to confirm is all that we require.

Reduce 30% tax

Our profile includes your UTR number, so you shouldn’t be charged 30% CIS tax again.

Our Services

Self-employed Startup

Includes Registering you as self-employed, applying for a UTR number, setting up a national insurance record, advising on a business bank account and optional accounting software.

Self-Assessment Tax Returns for Small Businesses

Sole Traders and CIS Subcontractors: Our once and done package covers you from start to finish and includes ongoing support throughout the year.

CIS Contractor Registration and Returns

If you employ the services of subcontractors, we can register you as a CIS contractor. You must do so to allow you to deduct your subcontractor’s tax and complete your monthly HMRC CIS300 submissions.

Late Penalty Appeals

Since 2011 late filing penalty charges are £10 per day. We have a 99% success rate in getting these charges refunded.

Backdated and long overdue returns

We are able to complete all tax returns regardless of how late they are, although any rebates you are owed will only be paid on the tax returns for the last 4 years, in most cases.

Amendments to your previous returns

If you feel that your previous tax returns were not completed accurately, we can propose amendments to your last four tax returns. This may also increase your rebate or decrease your tax bill.

Recovering Lost Records such as payslips and CIS deduction statements

We can appeal to the tax office to get as much information released as possible, whilst at the same time liaising with your past contractors to recover as much info as possible.

Accounting Software

NJB Taxback Ltd has partnered with Quickbooks are our team members are certified ProAdvisors. Thanks to our partnership, we can offer massive discounts on various QuickBooks licenses, and we can advise which one is most suitable for your business.


We can reconcile your QuickBooks transactions on either a monthly fixed cost rate or per transaction depending on which is most suitable for your business.

Get in touch with us today to find out more

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Our stats do our talking

Tax Saved

Measured over last four financial years

Penalty Appeals

1000+ late penalty appeals submitted

Refunds Paid

From HMRC pending status

Average Completion

From receiving all of your information

Verified Trustpilot Reviews

NJB came highly recommended by a colleague, and I was certainly not disappointed. Responses to my questions came swiftly, answers were clear and easy for me to understand. I also received help to streamline my record keeping, making things easier for me in the future, and potentially keeping end of tax year costs to a minimum. A highly professional service, that I can only highly recommend.

Andrew Thomas

As a Londoner, I would simply say pukka in other words excellent, fast and informative.

John Castle

I would highly recommend anyone who needs help with tax to contact NJB TAXBACK, They thoroughly explained the whole process and the app they have is another fantastic touch as it makes staying on top of your paperwork so much easier and you feel in control. Nicholas is very thorough and very quick to respond to any queries I had.

Alan Murtagh

Great polite and helpful service. The tax was in my account earlier than stated as it was last year, this is my second year working with NJB and long May our relationship continue. Thank you

Stephen Winterbottom
Cladders Mate

Highly recommend !!! This company is excellent at what they do, very professional and have excellent communication skills. I’ve used NJB Taxback for numerous years and have always been 100% satisfied with them. Highly recommended. 

Andrew Flavin
Project Manager

Fantastic Service! Nicholas brown is very informative and has great communication throughout the process. Will definitely use it again and recommend it to my friends and family!!

Ashley Duckenfield
Electricians Mate

Frequently Asked Questions

Do you offer a free consultation?

Yes, we offer a free 20-minute phone consultation. 

We will assess your business’s requirements and then come back to you with a no-obligation quote. 

How much do you charge?

Our pricing is done individually based on your business’s requirements.

Our service fees range on average between £300-£600 depending on your turnover and the complexity of your return.  We find that our fees are highly competitive compared to other Tax Rebate specialists, with the added benefit that we DO NOT take a percentage commission of your rebate, and we DO NOT charge VAT.

This ensures that your business receives the support it needs with the freedom to contact us as and when needed. 

This pricing method also aims to ensure you are not paying more than is required for the most suitable services for your business. 

Do you offer support?

Yes, our individual pricing ensures we can support your business without additional costs. 

Is there an average tax rebate?

We’re afraid there is no such thing as an average tax rebate. Your individual self-assessment tax return is precisely that, individual. There are simply too many varying factors for an “average rebate”.

Your business income and allowable business expenses determine your tax calculation, and while incomes per profession can be within an average, allowable business expenses rarely are. If each business earns and spends at different rates, but everybody receives an “average tax rebate”, something is wrong!

However, you can download our free App and use our rebate calculator to estimate YOUR tax rebate based on your business’s figures rather than an average!

I've spent £1,000 on allowable business expenses. How much tax do I get back?

Expenses reduce your “taxable income” and the amount of tax and national insurance you are charged.

You do not receive a full refund of the expenses you claim.

If you purchase an item for £1,000 and rightly claim £1,000 as an expense, you do not receive a £1,000 refund; otherwise, HMRC would essentially be purchasing the item.

Standard rate taxpayers are charged at the combined rate of 29%. Therefore, if you claim £1,000 in allowable business expenses, you save £290 in tax and national insurance.

If you have then had more tax deducted from you at source than is now due, you will receive a refund of the overpaid tax, a.k.a a tax rebate!

Refer a Friend and get £100

If you are happy with the service you received and know a friend, workmate or family member that might benefit from the same service, why not refer them to NJB TAXBACK?

Everytime you refer someone to NJB TAXBACK we’ll give you £100 as soon as we have received their payment. 

Get in Touch

Online, On the Phone, On-Site: We are flexible and can help you in whichever way you are most comfortable, online, on paper, over the phone, face to face, whatever suits you.

Download Our Free App

Download our free app on the iOS Appstore and Google Playstore. 

Speak To Us

Available Monday to Friday 09:00 – 17:00

Call 020 3822 0201


Contact Online

Leave a message on our contact form and a member of staff will get in touch with you as soon as possible.

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NJB Taxback Ltd

Kemp House
124 City Road