# Sole Trader Proof of Income NZ: IRD IR3, Summary of Income, GST 101A & Mortgage Guide (2026–2027)

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- **Jurisdiction / Region:** NZ
- **Last Verified:** Thu Nov 05
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- **Summary:** Sole trader proof of income NZ guide for freelancers, consultants & tradies: myIR Summary of Income, IR3, IR3B/IR10, GST 101A & $0 invoice ledger tool.

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# Sole Trader Proof of Income NZ: IRD IR3, Summary of Income, GST 101A & Mortgage Guide (2026–2027)

**Short answer: Under sole trader proof of income NZ rules, New Zealand banks, mortgage brokers, and property managers require self-employed freelancers, independent contractors, consultants, and tradies to verify income using 1 to 2 years of IRD IR3 individual income tax assessments, a myIR Summary of Income (including schedular WT payments), and form IR10 or IR3B financial summaries. For mid-year mortgage, tenancy, or vehicle finance applications between April 1 and March 31, pairing recent GST 101A returns (15% GST above $60,000 turnover) with a numbered NZD invoice and expense ledger verifies live cash flow.**

> **⚡ Instant NZ Sole Trader Invoice, 15% GST (`3/23`) & IR3 Proof-of-Income Ledger (`$NZD · $0 Free Core`):** New Zealand banks apply a **`20% to 35%` income haircut** when self-employed earnings are backed only by raw bank transfers, and every `$1,000` in unlogged GST-inclusive receipts (`3/23` fraction) or undocumented vehicle mileage (**`$1.17/km` IRD Tier 1 rate**) costs you **`$130.43` in GST 101A input credits plus `$260–$339` in avoidable IR3 income tax and ACC earner levy**. Build a compliant NZ tax invoice or year-to-date profit summary in the interactive **NZD Invoice & Tax Calculator** below (or click **🔗 Embed / CSV Template**), save up to **[5 Free Saves in your iCloud Web Workspace](/keel/workspace/)**, explore the **[Proof of Income & Ledger Edition](/keel/cpp/income-proof-solo-business/)** and **[AU/NZ Sole Trader Edition](/keel/cpp/australia-nz-sole-traders/)**, or **[Download Keel Free on the App Store (`$0/mo` Core · No Trial Clock · No Bank Link)](https://apps.apple.com/us/app/keel-invoice-maker-receipts/id6786659713?ppid=5f6e6b89-2472-415d-a316-5a9f2efcc727)** (`income-proof` — keep using the web tools anytime, or export clean IR3-ready invoice ledgers, CSVs, and receipt archives offline on iPhone).

Whether you work for yourself in Auckland, Wellington, Christchurch, or regional New Zealand as a **freelance designer, software developer, videographer, or photographer**, a **consultant, coach, personal trainer, independent real estate salesperson (`WT` schedular income), or event organiser**, or a **sole-trader builder, electrician, or plumber**, you do not receive fortnightly PAYE payslips. When you apply for a residential mortgage (ANZ, ASB, BNZ, Westpac, Kiwibank), an apartment tenancy, or vehicle finance, underwriters verify the exact numerical link between your [NZ invoices](/keel/nz-invoice-template/), your [GST 101A filings](/keel/nz-how-to-calculate-gst/), and your annual [IRD IR3 tax return](/keel/nz-ir3-explained/).

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## Which documents do New Zealand banks and landlords require for sole trader proof of income?

New Zealand's tax year runs from **1 April to 31 March**, and standard IR3 filings are due by **7 July** (or up to **31 March of the following year** with a tax agent extension of time). Because an annual IR3 return can be 6 to 11 months old when you apply for a loan or rental, NZ underwriters inspect four document layers:

| Verification Scenario | Required Trading History | Official myIR & Financial Documents Required | What NZ Underwriters & Landlords Check |
|---|---|---|---|
| **Residential Tenancy / Rental Application** | `3–12+ months` self-employed | **myIR Summary of Income**, last `3 months` of NZ bank statements, and a **Year-to-Date (`YTD`) Invoice & Expense Ledger** | Confirms consistent monthly client deposits and net profit sufficient to cover weekly rent comfortably |
| **Standard Residential Mortgage (ANZ, ASB, BNZ, Westpac, Kiwibank)** | `18–24+ months` self-employed (`12 months` in same industry by exception) | Last **2 years of IRD `IR3` Income Tax Assessments**, **myIR Summary of Income**, and **`IR10` (Financial Statements Summary) or `IR3B` (Schedule of Business Income)** | Averages 2 years of net pre-tax business profit (or uses the lower year if profit dropped), plus eligible non-cash **add-backs** |
| **Schedular Payment Contractors (`WT` Tax Code — Real Estate, IT, Film/Media, Labour-Only Tradies)** | `6–24 months` receiving `WT` payments | **myIR Summary of Income (showing monthly gross `WT` earnings and withholding tax deducted)** + `IR3` expense schedule | Because payers report `WT` schedular payments to IRD every payday, myIR provides a real-time government-verified gross income record! |
| **Current-Year Cash-Flow Proof (Between `1 April` and `31 March`)** | Active sole trader (GST-registered if `$60,000+` turnover) | Last **2 to 6 `GST 101A` returns** (`2-monthly` or `6-monthly` Box 5 Total Sales) + a **numbered YTD Invoice & Receipt Ledger (CSV/PDF)** | Proves that current-year trading matches or exceeds prior IR3 years without waiting until next July |

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## How do schedular payment (`WT`) contractors use myIR to prove real-time income?

In New Zealand, many independent professionals — including **commission real estate salespeople, film/video production crews, commercial cleaners, forestry/horticulture contractors, and labour-only building subcontractors** — have withholding tax (`WT` at `10.5% to 33%`, or an elected rate via form **`IR330C`**) deducted at source before their invoice is paid.

This gives `WT` contractors a major advantage when proving income:
- Every time your agency, production company, or head contractor pays your invoice, they file payday employment information with **Inland Revenue (IRD)**.
- By logging into **myIR → Income tax → Summary of income**, you can download an official, IRD-stamped PDF showing your **exact month-by-month gross schedular payments and tax already paid year-to-date** — even in the middle of the tax year before you file your `IR3`!
- Pairing that myIR Summary of Income with your **itemised invoice and expense ledger** lets a lender or landlord see both your government-verified gross income and your exact net profit after business expenses.

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## Which IR10 / IR3B expenses do NZ mortgage brokers add back to increase your borrowing capacity?

On your annual [NZ sole trader tax return (`IR3` + `IR10` / `IR3B`)](/keel/nz-ir3b-and-ir10-sole-trader-schedule-guide/), claiming every valid deduction — such as the **`$1.17/km` IRD Tier 1 mileage rate** (first `14,000 km`), **[low-value asset write-offs up to `$1,000` (excl. GST)](/keel/nz-low-value-asset-write-off-tradies-guide/)**, home office floor-area percentage, and ACC levies — cuts your income tax and provisional tax bill. However, it also lowers your net profit line.

When assessing mortgage serviceability under the Credit Contracts and Consumer Finance Act (`CCCFA`) and bank credit rules, NZ mortgage advisers can request **add-backs** for non-cash or one-off deductions clearly itemised on your **`IR10` / `IR3B`** and expense ledger:
1. **Book Depreciation (`IR10 Box 18 / IR3B`):** Non-cash depreciation on work vehicles, computers, cameras, and equipment (plus low-value assets under `$1,000` that do not recur every year) can often be added back to your assessable net profit.
2. **Home Office Apportionment (Fixed Dual-Purpose Costs):** If you deduct `10%–15%` of your existing residential rent or mortgage interest as a home-office expense, lenders avoid "double-counting" that housing cost against you when your ledger clearly separates home-office apportionment from external commercial rent.
3. **One-Off Extraordinary Business Costs:** Documented non-recurring legal, rebranding, or equipment repair costs that will not repeat in future trading years.

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## How do you structure a year-to-date NZD invoice and receipt ledger for mid-year loan or rental applications?

Between **1 April and 31 March**, your prior-year `IR3` return only reflects last year's trading. To prove your current year-to-date (`YTD`) earnings to a New Zealand bank or property manager without paying `$450–$900/year` for cloud accounting subscriptions:
1. **Issue Sequentially Numbered NZD Invoices (`Taxable Supply Information`):** Ensure every client invoice shows a sequential number (`#2026-001`, `#2026-002`), issue date, payment date, your GST number (if registered over `$60,000`), and the `15%` GST amount (`3/23` of the GST-inclusive total).
2. **Export a Clean CSV/PDF Profit & Loss Summary:** Pair your numbered invoice list with categorised business expenses (`Vehicle $1.17/km`, `Home Office`, `ACC Levies`, `Equipment/Tools`, `Software & Insurance`) so any underwriter can reconcile your net profit directly against your NZ bank deposits and `GST 101A` returns.

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## Worked example: Proving $96,000 of net sole trader income in Auckland with IR3, GST 101A, and a clean ledger

Consider an Auckland freelance software developer, marketing consultant, or licensed electrician billing **`$138,000` (including `$18,000` of 15% GST)** across six `2-monthly` `GST 101A` periods:
1. **Gross Ex-GST Revenue (`GST 101A` Box 5 minus Box 6, or `IR10` Box 1):** `$138,000 × (20 / 23)` = **`$120,000` ex-GST** (`$18,000` GST collected using the `3/23` fraction).
2. **Documented Business Expenses (`$31,500` ex-GST):**
   - Ongoing operating expenses (`$15,500` for software, professional indemnity insurance, ACC levies, and `9,500 km` of business travel at the **`$1.17/km` IRD Tier 1 rate** = `$11,115`).
   - Non-cash vehicle/equipment depreciation & one-off low-value asset purchases (`$7,500` on `IR10` Box 18).
   - Home-office rent/mortgage-interest apportionment (`$8,500` for a dedicated `12%` studio room).
3. **Net Taxable Profit on `IR3` Assessment:** `$120,000 - $31,500` = **`$88,500`** (saving over **`$10,400` in IRD income tax and ACC earner levy** plus **`$2,700` in GST 101A input tax credits**).
4. **Bank-Assessed Mortgage Income with Itemised Add-Backs:** Because their invoice and expense ledger clearly isolates the `$7,500` non-cash depreciation from recurring operating costs, the underwriter adds back `$7,500` — assessing their mortgage serviceability on **`$96,000` of verified annual income**.

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## Frequently asked questions

**How do I prove my income as a sole trader or freelancer in New Zealand?**
You prove sole trader income in New Zealand by providing: (1) your **myIR Summary of Income** and your last **1 to 2 years of IRD `IR3` Income Tax Assessments** (together with the **`IR10`** or **`IR3B`** business schedule), (2) your last **2 to 6 `GST 101A` returns** from myIR (if GST-registered over `$60,000`), and (3) a **Year-to-Date (`YTD`) numbered NZD Invoice & Expense Ledger** reconciled against your bank statements.

**How do I download my Summary of Income from myIR?**
Log in to **[myIR](https://myir.ird.govt.nz/)**, select your **Income tax** account, and click **More... → Summary of income** (or **Returns and transactions → Print summary of income**). Choose the relevant tax year (`1 April to 31 March`) or year-to-date period and download the official IRD PDF. If you receive schedular payments (`WT`), your year-to-date gross client payments and withholding tax will already appear on this summary.

**What is the difference between IR10 and IR3B when applying for an NZ mortgage?**
Both forms accompany your annual **IR3** return to show Inland Revenue (and your bank) how your gross sole trader turnover became your net taxable profit. **Form `IR10` (Financial Statements Summary)** is a standardised statistical summary of your Profit & Loss and Balance Sheet boxes (including Box 1 gross income, Box 18 depreciation, and Box 29 net profit), whereas **Form `IR3B` (Schedule of Business Income)** is the simplified income-and-expense schedule used by sole traders who do not prepare full formal financial statements. Either form is accepted by NZ banks when paired with a clean invoice and expense ledger.

**How long do you have to be self-employed to get a mortgage in NZ?**
Mainstream New Zealand banks (`ANZ`, `ASB`, `BNZ`, `Westpac`, `Kiwibank`) generally ask for **24 months (`2 financial years`)** of self-employed trading history backed by two filed `IR3` returns. However, if you have **12 to 18 months** of strong trading in the exact same trade or profession you previously worked in as a PAYE employee — backed by clean `GST 101A` returns and an itemised YTD invoice ledger — many banks and non-bank lenders will assess a 1-year self-employed application.

**Do I need to pay for cloud accounting software just to prove my sole trader income in NZ?**
No. Neither Inland Revenue (`IRD`) nor New Zealand banks require you to pay `$400–$900/year` for a cloud subscription if you are a sole trader. As long as you issue sequentially numbered **Tax Invoices / Taxable Supply Information** (showing your GST number and `15%` GST if registered over `$60,000`), keep digital copies of your receipts for the statutory **7-year IRD record-keeping period**, and export a clean **CSV/PDF Profit & Loss ledger** matching your bank deposits and `GST 101A` returns, your documentation is 100% compliant.

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