# Sg Tax Expert

> Singapore tax guidance for founders. Covers personal income tax, corporate tax (17%), and GST optimization. Use when planning tax strategy, calculating obligations, or preparing for IRAS filings. NOT professional tax advice - consult licensed tax agent for formal advice.

- Skill: `majiayu000/sg-tax-expert` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/sg-tax-expert`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/sg-tax-expert/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/sg-tax-expert

---


# Singapore Tax Expert

**Scope**: Tax planning assistance for Singapore founders — personal income tax, corporate tax, and GST.

**Disclaimer**: This skill provides informational guidance based on IRAS regulations. It is NOT professional tax advice. For formal tax planning, consult a licensed Singapore tax agent.

---

## Quick Reference

| Tax Type | Rate | Authority | Key Deadline |
|----------|------|-----------|--------------|
| Personal Income Tax | 0-24% progressive | IRAS | Apr 15 (paper) / Apr 18 (e-filing) |
| Corporate Tax | 17% (effective ~8.5% for first $300K) | IRAS | Nov 30 (ECI), Dec 15 (Form C-S/C) |
| GST | 9% (from Jan 2024) | IRAS | 1 month after accounting period |

---

## 1. Founder's Personal Income Tax

### Tax Residency
- **Tax resident**: Physically present or employed in Singapore ≥183 days in a calendar year
- Non-residents taxed at flat 24% (or progressive rates, whichever is higher)

### 2024/2025 Tax Brackets (Residents)

| Chargeable Income | Rate | Tax Payable |
|-------------------|------|-------------|
| First $20,000 | 0% | $0 |
| Next $10,000 | 2% | $200 |
| Next $10,000 | 3.5% | $350 |
| Next $40,000 | 7% | $2,800 |
| Next $40,000 | 11.5% | $4,600 |
| Next $40,000 | 15% | $6,000 |
| Next $40,000 | 18% | $7,200 |
| Next $40,000 | 19% | $7,600 |
| Next $40,000 | 19.5% | $7,800 |
| Next $40,000 | 20% | $8,000 |
| Next $500,000 | 22% | $110,000 |
| Above $1,000,000 | 24% | — |

### Key Reliefs & Deductions

| Relief | Amount | Notes |
|--------|--------|-------|
| Earned Income Relief | $1,000 (below 55) | Auto-included |
| CPF Relief | Actual contributions | Capped at OW ceiling |
| NSman Relief | $1,500-$5,000 | Based on activity |
| Parent Relief | $9,000-$14,000 | Conditions apply |
| Spouse Relief | $2,000 | Spouse income <$4,000 |
| SRS Contributions | Up to $15,300 (citizen) | Tax-deferred |
| Course Fees Relief | Up to $5,500 | Approved courses |

### Founder-Specific Optimization

1. **Salary vs Dividend Mix**
   - Salary: Tax-deductible for company, taxable personally
   - Dividends: Not tax-deductible, but one-tier system = no additional tax
   - Optimize: Pay enough salary for CPF, remainder as dividends

2. **Director's Fees**
   - Taxable in year of approval (not payment)
   - Defer approval to next year if beneficial

3. **SRS Contributions**
   - $15,300/year (citizens/PRs), $35,700 (foreigners)
   - Reduces taxable income now, 50% taxable on withdrawal at retirement

4. **Timing Income**
   - Bonuses: Control approval date to shift between tax years
   - Consulting income: Invoice timing matters

---

## 2. Corporate Tax

### Headline Rate: 17%

### Partial Tax Exemption (All Companies)

| Chargeable Income | Exemption |
|-------------------|-----------|
| First $10,000 | 75% exempt → $2,500 taxable |
| Next $190,000 | 50% exempt → $95,000 taxable |

**Effective tax on first $200,000**: ~$16,575 (8.3% effective rate)

### Startup Tax Exemption (First 3 Years)

For qualifying new companies:

| Chargeable Income | Exemption |
|-------------------|-----------|
| First $100,000 | 75% exempt |
| Next $100,000 | 50% exempt |

**Effective tax on first $200,000**: ~$8,125 (4.1% effective rate)

**Qualifying conditions**:
- Incorporated in Singapore
- Tax resident in Singapore
- ≤20 shareholders (all individuals, or 1 corporate + individuals)
- Not an investment holding or property development company

### Key Deductions

| Deduction | Rate | Cap |
|-----------|------|-----|
| R&D (qualifying) | 250% | — |
| IP registration costs | 200% | — |
| Automation equipment | 100% + CA | — |
| Donations (approved IPCs) | 250% | — |
| Training (approved courses) | 400% | — |

### Filing Deadlines

| Form | Deadline | Notes |
|------|----------|-------|
| ECI | Within 3 months of FYE | Estimated Chargeable Income |
| Form C-S | Nov 30 | Simplified, revenue ≤$5M |
| Form C | Dec 15 | Full form |
| AGM | Within 6 months of FYE | First AGM within 18 months |
| Annual Return | Within 7 months of FYE | To ACRA, not IRAS |

### Optimization Strategies

1. **Timing Expenses**
   - Accelerate deductible expenses into current FY if profits high
   - Defer income recognition if possible

2. **Related Party Transactions**
   - Must be at arm's length
   - Document transfer pricing policies

3. **Holding Structure**
   - Singapore has extensive DTAs (80+ countries)
   - Consider holding company structure for regional ops

4. **Carry-forward Losses**
   - Unlimited carry-forward (subject to shareholding test)
   - Can offset against future profits

---

## 3. GST (Goods & Services Tax)

### Current Rate: 9% (from Jan 1, 2024)

### Registration Threshold

| Basis | Threshold | Action |
|-------|-----------|--------|
| Retrospective | Taxable turnover >$1M in past 12 months | Must register within 30 days |
| Prospective | Expect >$1M in next 12 months | Must register within 30 days |
| Voluntary | Below threshold | Can register voluntarily |

### What's Taxable

| Category | GST Treatment |
|----------|---------------|
| Local goods/services | Standard-rated (9%) |
| Exports | Zero-rated (0%) |
| Financial services | Exempt |
| Residential property sale/rent | Exempt |
| Digital services (imported) | Subject to GST |

### Input Tax Claims

**Can claim**: GST paid on business purchases
**Cannot claim**:
- Private expenses
- Medical expenses (with exceptions)
- Club memberships
- Motor vehicle expenses (with exceptions)

### Founder Considerations

1. **Voluntary Registration**
   - Pros: Claim input tax, appear established
   - Cons: Compliance burden, 2-year lock-in

2. **Pricing Strategy**
   - B2B: Customers claim back, less price sensitive
   - B2C: 9% impacts competitiveness

3. **Export-Heavy Business**
   - Zero-rated output, claimable input = GST refunds
   - Consider voluntary registration

---

## 4. Key Dates Calendar

### Personal Tax
- **Mar 1**: Form B1 available
- **Apr 15**: Paper filing deadline
- **Apr 18**: E-filing deadline
- **May-Sep**: NOA issued

### Corporate Tax
- **ECI**: 3 months after FYE
- **Form C-S/C**: Nov 30 / Dec 15
- **Tax payment**: 1 month after NOA

### GST
- **Quarterly filing**: 1 month after quarter end
- **Payment**: Same as filing deadline

---

## 5. Common Founder Scenarios

### Scenario A: Early-Stage, No Revenue
- Personal: Likely no tax (no income)
- Corporate: File nil ECI, no tax
- GST: Not registered (below threshold)

### Scenario B: Growing, <$200K Profit
- Personal: Optimize salary/dividend split
- Corporate: Enjoy startup exemption (~4% effective)
- GST: Monitor $1M threshold

### Scenario C: Scaling, >$1M Revenue
- Personal: Max out SRS, consider timing
- Corporate: Normal partial exemption (~8%)
- GST: Mandatory registration

---

## 6. Tasks This Skill Can Help With

- [ ] Calculate estimated personal tax liability
- [ ] Optimize salary vs dividend split
- [ ] Estimate corporate tax with exemptions
- [ ] Determine GST registration requirement
- [ ] Create tax calendar with deadlines
- [ ] Prepare checklist for tax filing
- [ ] Research specific deductions/reliefs
- [ ] Model different scenarios

---

## 7. Official Resources

| Resource | URL |
|----------|-----|
| IRAS Personal Tax | https://www.iras.gov.sg/taxes/individual-income-tax |
| IRAS Corporate Tax | https://www.iras.gov.sg/taxes/corporate-income-tax |
| IRAS GST | https://www.iras.gov.sg/taxes/goods-services-tax-(gst) |
| Tax Calculator | https://www.iras.gov.sg/taxes/individual-income-tax/basics-of-individual-income-tax/tax-calculator |
| ACRA | https://www.acra.gov.sg |

---

## Reminder

This skill provides general guidance. Tax situations are individual. For:
- Complex structures → Consult tax advisor
- Cross-border income → Consult tax advisor
- Significant optimization → Consult tax advisor
- IRAS queries/audits → Engage tax agent

The goal is to help you understand the landscape and prepare, not replace professional advice.