Model realistic AI token economics, recover $23,000+ in zombie SaaS spend,
and calculate S-Corp tax thresholds with 2026 statutory rigor — free deterministic tools and in-depth guides, zero signup.
Deterministic models backed by statutory baselines, IRS code, and real-world commercial scenarios written by the BizCalcLab Editorial Team.
Explore how the 10%–37% rates became permanent under federal law, Rev. Proc. 2025-32 inflation projections, and what business owners must plan for.
Why a $150k salary requires a $95–$115/hr contractor rate. Mathematical breakdown of self-employment tax, uncompensated PTO, and healthcare buffers.
Step-by-step breakdown of the 15.3% SE tax, the 92.35% net profit factor, and the above-the-line 50% deduction to avoid IRS penalties.
Balance W-2 shareholder wages and dividend distributions safely. How to maximize the 20% pass-through QBI deduction while meeting IRS guidelines.
The problem with conventional business tools — and why we built a private, transparent FinOps engine for you.
Running your daily business numbers shouldn't feel like navigating a lead-generation trap. For too long, small business owners and freelancers have faced the same frustrations online:
We created BizCalcLab as an independent, privacy-first FinOps engine to give entrepreneurs, contractors, and agency founders the honesty they deserve:
Every computational engine below is built on the same statutory verification standards as our long-form research guides — IRS baselines, transparent formulas, and 100% client-side privacy.
Calculate your gross profit margin, operating margin, and net profit margin instantly. Essential for small business pricing strategy.
Find your break-even point — exactly how many units to sell to cover costs. Master break-even analysis for smarter business planning.
Estimate your 1099 Social Security and Medicare taxes instantly. Know exactly what you owe as a freelancer or sole proprietor.
Calculate your ideal hourly freelance rate or project fee based on your target income, business expenses, and billable hours.
Calculate gross vs net take-home pay after federal, state, and payroll tax deductions. Instant paycheck breakdown for 2026.
Create professional PDF invoices instantly in your browser. Download or print customizable invoice templates with zero signup required.
Jump directly into our specialized calculation clusters tailored for small businesses, contractors, and growing agencies.
Set competitive product prices, protect gross/net margins, optimize SaaS tiers, and model AI agent ROI.
Calculate take-home pay, hourly billable rates, employer burden, and generate client-side PDF invoices.
IRS Rev. Proc. 2025-32 QBI deduction, Notice 2026-10 mileage, Form 8829 home office, and S-Corp tax savings.
SBA 7(a) & 504 underwriting (DSCR 1.25x), invoice factoring APR breakdown, and commercial loan schedules.
Startup burn rate runway, working capital ratios, EBITDA multiples, and MACRS asset depreciation schedules.
LLC vs S-Corp vs C-Corp tax liability modeling, lease vs buy NPV, and 7-pillar financial health scoring.
A comprehensive suite of financial calculators designed for every aspect of your business.
Calculate gross, operating & net margins
AvailableFind your break-even point
AvailableSet optimal product prices
AvailableModel LLM tokens vs payroll savings
NewModel freemium, tiered & usage tiers
AvailableCut ghost seats, annual arbitrage & waste
AvailableSimplified vs Form 8829 deduction
AvailableStandard rate (72.5¢/76¢) vs actual costs
Available20% Section 199A pass-through write-off
AvailableEstimate your self-employment taxes
AvailableCompare 1099 vs W-2 tax impact
AvailableCalculate quarterly estimated taxes
AvailableEstimate S-Corp tax savings
AvailableEstimate your tax refund
AvailableCalculate take-home pay after tax
AvailableConvert wage, overtime & annual pay
AvailableSet your ideal hourly rate
AvailableCalculate true employee costs
AvailableCreate professional invoices free
AvailableCapex, burn rate & runway buffer
AvailableProject your cash flow
AvailableEstimate your business value
AvailableMeasure return on investment
Available7(a) & 504 loan payments, fees & DSCR
AvailableAdvance rate, discount fees & effective APR
AvailableCalculate loan payments & interest
AvailableAssess your business health
AvailableCalculate your net worth
AvailablePlan your debt payoff strategy
AvailableCalculate compound interest
AvailableCalculate working capital
AvailableCalculate asset depreciation
AvailableCalculate your EBITDA
AvailableCompare different loan options
AvailableDecide between leasing or buying
AvailableCompare business structures
AvailableCalculate business revenue
AvailableWe built these tools with one goal: help you make better business decisions, faster.
Use any tool instantly without creating an account, providing an email, or paying a dime. Ever.
Get accurate calculations in real-time as you type. No waiting, no processing — just answers.
All calculations run entirely in your browser. We never see, store, or transmit your financial data.
Works perfectly on any device — phone, tablet, or desktop. Calculate on the go, anytime.
Browse our collection of 38 free business calculators and pick the one you need.
Fill in your business data using our intuitive, clearly-labeled input fields.
See detailed calculations, breakdowns, and visual charts — instantly with zero signup.