Common Mistakes When Claiming Tax Credits

Claiming tax credits can be a lifeline for many families and individuals. However, the process can be complex, and even small mistakes could lead to delays, incorrect payments, or penalties. To help you avoid these pitfalls, we’ve outlined the most common errors people make when claiming tax credits and how to prevent them.


1. Providing Incorrect Personal Details

One of the most frequent mistakes is submitting incorrect or incomplete personal details. Mistakes in names, addresses, or National Insurance numbers can cause delays in processing your claim.

How to Avoid:


2. Misreporting Your Income

Underestimating or failing to accurately report your income can lead to overpayments, which HMRC will ask you to repay. On the other hand, overestimating your income may result in receiving less support than you’re entitled to.

How to Avoid:


3. Failing to Update HMRC About Changes

Life changes such as moving house, changing jobs, or having a child can affect your tax credit entitlement. Not informing HMRC about these changes can result in underpayments or overpayments.

How to Avoid:


4. Claiming Tax Credits You’re Not Eligible For

Some claimants apply for tax credits without fully understanding the eligibility criteria, leading to rejected claims or penalties.

How to Avoid:


5. Missing the Annual Renewal Deadline

Tax credits must be renewed annually. Missing the renewal deadline can result in your payments stopping or being overpaid.

How to Avoid:


6. Not Keeping Records

Failing to keep financial records can lead to errors when completing your application or during a compliance check.

How to Avoid:


7. Misunderstanding Joint Claims

If you live with a partner, you are required to make a joint claim. Applying as a single individual when you’re part of a couple can lead to penalties and repayment demands.

How to Avoid:


8. Ignoring Overpayment Notices

Overpayment notices from HMRC are not uncommon. Ignoring these notices can lead to further financial penalties and legal action.

How to Avoid:


9. Overlooking Childcare Costs

Failing to report eligible childcare costs can result in lower payments than you’re entitled to. Conversely, overreporting costs may lead to overpayments.

How to Avoid:


10. Not Using Available Tools

Many people make mistakes because they do not use the resources available to them, such as calculators or guidance tools.

How to Avoid:


Final Thoughts

Claiming tax credits can be a straightforward process if you’re aware of the potential pitfalls. By taking the time to double-check your details, staying informed about eligibility requirements, and keeping HMRC updated on changes in your circumstances, you can avoid unnecessary delays, overpayments, and penalties.

Using tools like our Working Tax Credit Calculator can help you navigate the process with confidence, ensuring you receive the support you’re entitled to. The key is accuracy and timely communication, which will save you both time and stress in the long run.