Sam Rivera
Founder, GigProfit · Software engineer & freelance tax researcher
Sam Rivera has spent 8+ years working across freelance markets in North America, Europe, and Asia — both as a practitioner and as a builder of tools for independent professionals. The tax engine behind GigProfit was built by cross-referencing official government publications and updated as regulations change.
- ·8+ years freelancing across US, EU, TR, and APAC clients
- ·Tax engine reviewed against official IRS, HMRC, GİB, and GST Council documentation
- ·Open-source contributor at github.com/SkrenLabs
Articles by Sam Rivera
Taxes
Freelancer Taxes in Turkey: Complete 2025 KDV Guide
Turkey's dual tax system for freelancers — KDV and Stopaj — confuses even experienced independents. Here's a plain-English breakdown of what you owe, when to register, and how to calculate your real take-home pay.
2026-04-29 · 7 min
Taxes
US Self-Employment Tax Deductions in 2026: What Freelancers Can Write Off
The One Big Beautiful Bill Act introduced new above-the-line deductions for 2026. Here is what freelancers can actually claim, from home office costs to the new auto loan interest deduction.
2026-05-01 · 8 min
Pricing
1099 vs W-2: Why Contractors Need to Charge 25–35% Higher Rates
A W-2 employee costs an employer 20–30% above salary in benefits and payroll taxes. A 1099 contractor pays the full 15.3% self-employment tax alone. Here is the math behind the markup.
2026-05-01 · 7 min
Taxes
Home Office Tax Deduction for Freelancers: How to Maximize It
The simplified method caps out at $1,500, while the actual expense method can yield a larger deduction. We explain the exclusive-use rule and which records to keep in 2026.
2026-05-01 · 7 min
Taxes
How to Calculate Quarterly Taxes as a Freelancer (2026 Guide)
A practical guide to US quarterly estimated taxes for freelancers. Learn the Safe Harbor rule, 2026 deadlines, and how to calculate what you owe every three months.
2026-06-01 · 8 min