Disclaimer

Educational purposes only

The calculators on FigureCal produce estimates for informational and educational purposes only. They are designed to illustrate how published tax brackets, amortization formulas, and official government data apply to a set of user-supplied inputs. The outputs are not tax returns, official tax determinations, appraisals, loan approvals, or financial projections. They are starting points for your own research, not conclusions you should act on without independent verification.

No professional relationship

Using this site, running a calculator, or receiving a numerical output does not create a CPA-client relationship, an attorney-client relationship, a fiduciary relationship, or any other professional or advisory relationship between you and FigureCal or its author. Wanyu T is an independent researcher, not a licensed CPA, enrolled agent, tax attorney, or registered investment advisor. Nothing on this site constitutes professional tax, legal, financial, or investment advice, and no communication from this site should be interpreted as such.

Known limitations and exclusions

These calculators deliberately model well-documented, commonly applicable scenarios. They do not model every situation, and some situations that appear simple on the surface are not. The following provisions, scenarios, and edge cases are explicitly not modeled by the current calculator set:

• Alternative Minimum Tax (AMT). If your income or deductions make AMT plausible, these calculators will not flag it or account for it.
• SALT cap edge cases. The SALT deduction calculator models the standard cap; it does not model contested state workarounds, pass-through entity elections, or refund-inclusion rules.
• OBBB phase-outs above MAGI thresholds. The tip and overtime deductions phase out above $150,000 (Single) / $300,000 (Married Filing Jointly) MAGI. The calculators apply a simplified phase-out; the actual statutory computation may differ depending on how MAGI is calculated for your situation.
• Multi-state income nexus. If you earn income in more than one state, or work remotely for an employer in a different state, your state tax liability is outside the scope of these tools.
• Part-year resident allocations. Income allocation rules for taxpayers who moved states mid-year are not modeled.
• Mortgage points, origination fees, and closing costs. The mortgage calculator models principal and interest only; upfront costs are not amortized into the payment or APR.
• Adjustable-rate mortgages (ARMs). Only fixed-rate, fully-amortizing loans are modeled. ARM rate resets are outside the scope of these tools.
• FHA mortgage insurance variability. The FHA loan calculator applies HUD's published MIP tiers (per Mortgagee Letter 2023-05), but actual MIP can vary by loan term, LTV, and lender overlays not captured here. FHA MIP cancellation rules depend on origination date and LTV at origination.
• Mortgage payoff scenarios. Extra-payment projections assume the extra amount is applied to principal in every period with no prepayment penalty. Many real-world loans route extra payments differently; verify with your servicer before relying on early-payoff estimates.
• PMI variation by lender and credit score. PMI is estimated at a flat rate; actual PMI pricing varies by loan-to-value, credit profile, and lender.
• Assessed-value caps. Property tax caps like California Proposition 13, Texas's 10% homestead assessment cap, and similar state-level constraints on assessed-value growth are not modeled. The calculator uses effective rates applied to market value.
• Chained CPI. The inflation calculator uses BLS CPI-U (standard). It does not model chained CPI-U (C-CPI-U).
• PCE deflator. The Federal Reserve's preferred inflation measure, the Personal Consumption Expenditures price index, is not modeled.
• Sales tax hyper-local variance. The sales tax calculator applies average state and county rates sourced from the Tax Foundation. It does not reflect special taxing districts, product-specific exemptions (e.g., groceries, medicine), or municipality-level rate changes that may differ from the published average.
• Business cash flow simplifications. Burn rate and breakeven calculators use linear, single-period projections. They do not model accounts-receivable delays, revenue seasonality, sudden capital expenditures, or capital structure changes. Use these outputs as rough planning benchmarks, not cash-flow forecasts.
• 1099 and side-hustle safe harbor rules. Quarterly estimated tax calculations apply the standard 90% / 110% safe-harbor rules but do not compute the annualized income installment method for taxpayers with highly uneven income. If your self-employment income arrives unevenly across quarters, the estimated payment shown may not prevent an underpayment penalty.
• Crypto accounting method assumptions. The crypto tax calculator assumes first-in, first-out (FIFO) lot assignment. It does not support specific lot identification (Spec ID), highest-in/first-out (HIFO), or average-cost methods. Actual tax liability can differ materially depending on which method your accountant or exchange uses. Wallet-to-wallet transfer fees are not modeled.
• Student loan repayment plan eligibility. The student loan calculator models IBR, PSLF, standard 10-year, and RAP repayment projections based on 2026 Federal Poverty Level guidelines. It does not verify individual loan eligibility, servicer-specific rules, or income certification procedures. PSLF qualifying employer status is not confirmed by this calculator.

Knowing where the math breaks down is part of using these tools responsibly. If your situation involves any of the above, treat the output as a rough floor or ceiling rather than a precise estimate, and verify with a qualified professional.

Source-currency notice

Tax brackets, CPI values, rate tables, and phase-out thresholds are sourced from official government publications — primarily IRS Revenue Procedures, IRS Publications, and Bureau of Labor Statistics data releases. Each calculator's “Last reviewed” date indicates when the underlying source data was last verified against the official publication. Updates to calculator data may lag the relevant IRS Revenue Procedure or BLS release by up to 48 hours. During the gap between a new official release and our update, outputs may reflect prior-period data.

External links

Calculator pages and methodology documentation on this site include links to external resources including the IRS, Bureau of Labor Statistics, U.S. Treasury, Tax Foundation, and other government and research organizations. These external sites are not under FigureCal's control. FigureCal does not endorse, guarantee, or take responsibility for the accuracy, completeness, or availability of external sites. Links are provided as source citations; verify the content at its source.

Independent verification

For any financial, tax, or legal decision — filing a return, applying for a mortgage, selling an investment, planning for retirement — consult a licensed CPA, tax attorney, enrolled agent, or registered financial advisor. A qualified professional will have access to your complete financial picture, the ability to apply judgment to ambiguous rules, and the professional and legal accountability that a calculator does not carry.

The IRS provides a directory of credentialed tax professionals at irs.gov/tax-professionals.