Tax and business calculators
23 calculators, grouped by topic. Each one is an estimate from your own numbers, not advice; Krystal checks the real picture on a call.
4 calculators
Planning the year
Estimated payments, deadlines and the multi-year view.
Multi-Year Tax Planner
Federal tax projected over several years under current law, with strategies to compare.
Quarterly Tax Estimator
Your estimated payments, the safe harbor amounts and the payment schedule.
Tax Penalty Calculator
An estimate of the IRS underpayment penalty, and whether you meet safe harbor.
Tax Extension Deadline
Original and extended filing deadlines by entity type.
6 calculators
Self-employment and S-Corps
Payroll tax, salary and entity choices for owners.
Self-Employment Tax Calculator
Social Security and Medicare on your business income, line by line.
S-Corp Tax Savings
How an S-Corp election changes the payroll tax on your profit.
Reasonable Salary (S-Corp)
A salary range for an S-Corp owner, with industry pay benchmarks.
Entity Comparison
Sole proprietorship, LLC, S-Corp, C-Corp and partnership side by side.
QBI Deduction
The Section 199A deduction, including the limits for service businesses.
Retirement Plan Comparison
SEP-IRA and Solo 401(k) contribution limits for your numbers.
5 calculators
Income tax and paychecks
Brackets, withholding and the newer federal deductions.
Tax Bracket Calculator
How each dollar of income falls across the federal brackets.
Paycheck Calculator
Take-home pay after federal withholding, FICA and pre-tax deductions.
Capital Gains Tax
Tax on an investment gain, short-term against long-term, with NIIT.
Tips & Overtime Deduction
The 2025–2028 deductions for qualified tips and overtime pay, with the income phaseout.
Car Loan Interest Deduction
Deductible interest on a qualifying vehicle loan through 2028, with the $10,000 cap.
3 calculators
Business deductions
Home office, vehicles and equipment.
3 calculators
Starting a business in Texas
First steps, the hobby test and franchise tax.
2 calculators
Rental property
Returns and depreciation on a rental.
Start with fifteen minutes.
Krystal calls you to see whether LeCPA fits what you’re building.