Calculation basis, sources and review
Taxable non-PAYE income = receipts − allowable costs (not below zero). PAYE collection is possible only when taxable ≤ €5,000 and gross ≤ €30,000; otherwise self-assessment. Reserve = taxable × entered marginal rates.
- Publisher
- Count.ie, operated by K Imports
- Page last updated
- — explanatory content and transparency information, not a new rules verification.
- Documented source check
- No dated source check recorded.
- Professional review
- No named independent professional review is recorded for this tool.
Any dated method notes below apply only to their stated scope. A formula or user-entered rate is not evidence that statutory rules are current.
Uses the cited Revenue guidance for the stated method and scope. This is not Revenue approval or endorsement.
Source references
Estimates, not financial, tax, legal or accounting advice. How our dates and checks work. Report a correction.
Do I need to file a tax return for side income on top of my PAYE job?
Classify side income against Revenue's €5,000 taxable and €30,000 gross limits and reserve tax at your own marginal rates. Revenue may ask for a PAYE return only where taxable non-PAYE income is €5,000 or less and gross non-PAYE income is €30,000 or less, with collection arranged through PAYE. Above either limit, or with another self-assessment trigger, Form 11 applies. This is a filing route, not an exemption; the tax reserve uses your own marginal-rate assumptions.
How the calculation works
PAYE side-income filing planner applies one fixed set of rules to the inputs described below, so the same entries always give the same answer. The exact formula is published once, in the Sources, formula and methodology section further down this page.
Gross non-PAYE receipts (€) is entered as 4,200 in the illustration. Keep the unit shown on the field when substituting your own measurement or amount. Allowable costs (€) is entered as 600 in the illustration. Keep the unit shown on the field when substituting your own measurement or amount. Marginal income tax rate (%): Your own assumption, usually 20 or 40. Marginal USC rate (%) is entered as 4 in the illustration. Keep the unit shown on the field when substituting your own measurement or amount.
Worked example
A fixed illustration uses Gross non-PAYE receipts (€): 4,200; Allowable costs (€): 600; Marginal income tax rate (%): 40; Marginal USC rate (%): 4. Filing Route: Revenue may collect through PAYE credits — only if Revenue agrees; Estimated Tax Reserve: €1,584.00; Net Kept: €2,016.00. All remaining illustrated settings are listed in the example-input disclosure below. These are reproducible sample figures, not saved visitor inputs; this text does not change when you edit the interactive form.
Compare filing route, estimated tax reserve, net kept using matching periods and units. A total cost, a recurring payment and a percentage answer different questions. Check omitted costs and the timing of payments before using the result as a spending commitment.
What moves the answer
Each comparison changes one input of the fixed example and re-runs this calculator’s engine. Other assumptions stay unchanged.
- Raising gross non-paye receipts (€) from 4,200 to 4,620, with everything else unchanged, estimated tax reserve moves from €1,584.00 to €1,768.80 and net kept moves from €2,016.00 to €2,251.20.
- Raising allowable costs (€) from 600 to 660, with everything else unchanged, estimated tax reserve moves from €1,584.00 to €1,557.60 and net kept moves from €2,016.00 to €1,982.40.
Frequently asked questions
What happens if I increase gross non-paye receipts (€) in this example?
Changing gross non-paye receipts (€) from 4,200 to 4,620, with the other example settings unchanged, changes estimated tax reserve from €1,584.00 to €1,768.80. This isolates one input using the form's actual calculation. Compare changes separately rather than attributing a difference to several assumptions at once.
What assumptions should I check for PAYE side-income filing planner?
Not an exemption. The limits are Revenue guidance for when it may ask for a PAYE return; collection through PAYE is subject to Revenue's agreement. Exact incremental tax is not computed, so rates are manual assumptions. The linked sources support the documented method, not every possible circumstance. Confirm transaction dates and eligibility where relevant, and distinguish a statutory rate from a rate you enter yourself.
Quick answer
The PAYE side-income filing planner model returns filing route, estimated tax reserve and net kept. Revenue may ask for a PAYE return only where taxable non-PAYE income is €5,000 or less and gross non-PAYE income is €30,000 or less, with collection arranged through PAYE.
Outputs and units: Filing Route (text label); Estimated Tax Reserve (euro (€)); Net Kept (euro (€)).
Fixed worked example results
PAYE side-income filing planner example — Gross non-PAYE receipts (€): 4,200; Allowable costs (€): 600; Marginal income tax rate (%): 40; Marginal USC rate (%): 4. Filing Route: Revenue may collect through PAYE credits — only if Revenue agrees; Estimated Tax Reserve: €1,584.00; Net Kept: €2,016.00.
Illustration only, not your entered figures. Use the complete example inputs below, selected options and stated limitations when quoting these results.
| Result | Example value |
|---|---|
| Filing Route | Revenue may collect through PAYE credits — only if Revenue agrees |
| Estimated Tax Reserve | €1,584.00 |
| Net Kept | €2,016.00 |
Exact inputs used in the worked example
- Gross non-PAYE receipts (€)
- 4,200
- Allowable costs (€)
- 600
- Marginal income tax rate (%)
- 40
- Marginal USC rate (%)
- 4
- Marginal PRSI rate on this income (%)
- 0
- Proprietary director, spouse of one, or another self-assessment reason applies
- no
- Revenue has agreed to collect the tax through PAYE credits
- no
Cite this calculation example
Count.ie. PAYE side-income filing planner: fixed worked example. Page updated 2026-10-16. https://count.ie/finance/paye-side-income-planner/#worked-example
This citation describes the fixed example above, not your entered figures. Include the complete assumptions and relevant year when quoting a result. Official sources remain the authority on the underlying rules.
Link to the worked exampleFixed example, assumptions and sources (JSON)AI discovery index
Sources, formula and methodology
| Step | Formula or calculation | When it applies |
|---|---|---|
| Published calculation method | Taxable non-PAYE income = receipts − allowable costs (not below zero). PAYE collection is possible only when taxable ≤ €5,000 and gross ≤ €30,000; otherwise self-assessment. Reserve = taxable × entered marginal rates. | Use the stated input units, supported modes and limitations below. |
Assumptions and limits
Not an exemption. The limits are Revenue guidance for when it may ask for a PAYE return; collection through PAYE is subject to Revenue's agreement. Exact incremental tax is not computed, so rates are manual assumptions.
Explanation of the implemented calculator, not independent professional review, enactment verification or a promise of AI citation. See the source links and review scope above.