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Run your freelance business with numbers you trust
Slide, calculate, decide. DevBizTools gives freelancers and developers powerful calculators that show their work — not just a final number.
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Freelance Rate Calculator
Find your ideal hourly and day rate based on income goals, expenses, taxes, and billable hours.
Open toolHosting Cost Comparison
Compare total hosting costs over time — including migration fees — to see if switching saves money.
Open toolShould I Go Freelance?
See how many hours you'd need to bill to match your current job — salary plus benefits.
Open toolInternational Payment Fees Calculator
See how much PayPal, Wise, and Payoneer actually cost you per payment.
Open toolTax Set-Aside Calculator
Figure out how much of every invoice to set aside for taxes.
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What is DevBizTools?
DevBizTools is a free resource for freelancers and solo business owners who need practical numbers — not generic advice. Every calculator runs entirely in your browser: no account, no signup, and your inputs never leave your device.
The site was built by Delawar Shah, a developer who freelanced for years and got tired of spreadsheets that hid the real math behind rates, taxes, and payment fees. The guides on the blog go deeper on the same topics — pricing, clients, contracts, and cash flow — with worked examples you can apply immediately.
Affiliate links appear on some pages and are always disclosed. They never change how the calculators work. The goal is simple: help you charge enough, save for taxes, and keep more of every invoice.
New to freelancing? Start here
A short path from employed to sustainable solo work — tools first, then the guides that explain the why.
Calculate your rate
Start with the freelance rate calculator — income goal, tax, expenses, and billable hours in one place.
Rate Calculator →Set aside for taxes
Every payment should trigger a tax savings transfer. Use the set-aside calculator to pick a percentage.
Tax Calculator →Read the essentials
How to set your rate, track billable hours, and write contracts that protect your time.
Rate Guide →Compare going solo
Run break-even hours against your salary and benefits before you quit — or validate the leap.
Break-Even Tool →
Browse by Topic
Find guides and free calculators organized by what matters to your freelance business.
Hourly rates, billable time, and fixed-price quotes — with free calculators.
Tax set-asides, invoicing, quarterly payments, and keeping more of what you earn.
Portfolios, proposals, platforms, and landing your next client.
True hosting costs, migration math, and when switching actually saves money.
Going solo, vs employment, burnout prevention, and building a sustainable practice.
International fees, PayPal vs Wise, and getting paid without losing margin.
Guides
Popular guides
ChatGPT Prompts for Freelancers (2026)
30 chatgpt prompts freelancers use in 2026 — copy-paste AI prompts for proposals, cold outreach, pricing, client emails, and productivity. Start today.
Freelance Contract Guide 2026: 10 Clauses
Freelance contract guide 2026 — 10 essential clauses, client red flags, and how to protect yourself. General guidance, not legal advice.
Upwork vs Fiverr vs Toptal: Best in 2026?
Upwork vs Fiverr vs Toptal in 2026 — fees, vetting, and pay compared. Find the best freelance platform for beginners, experts, and global freelancers.
How to Get Your First Freelance Client (2026)
How to get your first freelance client in 2026 — portfolio tips, platforms, outreach templates, and a 30-day plan for beginners with no experience.
Write a Winning Freelance Proposal (2026)
How to write a freelance proposal that wins clients — structure, examples, pricing, and a free template for 2026. Convert more leads into paid work.
10 Best Invoicing Tools Freelancers Use (2026)
Best invoicing tools freelancers use in 2026 — FreshBooks, Bonsai, Wave, Stripe & more compared. Free vs paid, features, pricing, and picks by use case.