Is your tax code wrong? If you're seeing codes like "EMERG", "Week 1", or your tax credits seem too low, you're likely overpaying tax. A wrong tax code can cost you hundreds of euros per month—but the good news is it can be fixed and you can claim back what you've overpaid.
Our specialists fix tax code issues and recover overpayments every day. Here's how to spot problems and get your money back.
📊 Tax Code Problems
- Emergency tax: Credits not applied at all
- Week 1 basis: Non-cumulative calculation
- Wrong credits: Missing entitlements
- Refund potential: €500 – €3,000+
Signs Your Tax Code Is Wrong
Check your payslip for these warning signs:
- "EMERG" – Emergency tax, significantly overpaying
- "Week 1" / "Month 1" – Non-cumulative, may cause overpayment
- Tax credits at €0 – Should be at least €4,000 annually
- Lower take-home than expected – For your salary level
Common Causes
Tax codes often go wrong when you:
- Change jobs – New employer doesn't have correct details
- Start first job – Not registered with Revenue
- Return from abroad – Tax status needs updating
- Have multiple jobs – Credits split incorrectly
💡 Real Example
Aoife's tax code showed "Week 1" for nine months after changing jobs. She thought something seemed off but didn't know what. When we reviewed her tax, she'd overpaid €1,840—all recovered with her claim.
How to Fix It and Get Refunds
Our specialists handle tax code problems completely:
- Identify all issues: Review your complete four-year history
- Calculate overpayments: Work out exactly what you're owed
- Claim refunds: Submit claims for all overpaid tax
- Find additional reliefs: Rent credit, medical, work expenses
You can claim back overpaid tax for up to four years. The average refund is €1,080.
Other Reliefs You Might Be Missing
Tax code issues are often just the start. We also check for:
- Rent tax credit – up to €1,000/year
- Medical expenses – 20% relief
- Work expenses – for many professions
- Working from home – for remote workers
Tax Code Problem? We'll Fix It
Our experts will identify issues and claim back all your overpaid tax.
Start Your Tax Review →No refund, no fee • Average refund €1,080 • TAIN: 77632V
Frequently Asked Questions
Will fixing my tax code affect my current wages?
Fixing the code going forward improves your future take-home. Claiming back overpayments is separate—you get a lump sum refund for what you overpaid.
How far back can I claim?
Four years. If your tax code was wrong at any point since 2021, we can claim back the overpayment.
How quickly will I get my refund?
once we submit your claim, Revenue typically processes refunds within 5-10 working days, paid directly to your bank.