THE MATH OF
REALITY.
Formulas, SSA wage base, IRS FICA rates, and dated sources—not a weekly content clock.
The short version
Save-Check plans rent and savings on estimated net after employee FICA, not gross. This page lists the 2026 SSA wage base, IRS rates, and every tool formula.
Offer letter vs leftover (illustrative)
$75,000 gross, single-earner sketch. FICA uses the 2026 employee rates (6.2% OASDI up to the SSA wage base + 1.45% Medicare). The 20% line is a federal + state withholding stand-in—not your W-4.
| Layer | Monthly | Use this for |
|---|---|---|
| Offer letter (gross) | $6,250 | Negotiation only |
| After employee FICA 7.65% | $5,772 | SSA / IRS statutory slice |
| After 20% withholding estimate | $4,618 | Budget and My Money Check |
| Leftover after $1,800 rent | $2,818 | Food, transit, goals |
Same math as the salary engine. 2026 FICA wage base and methodology.
Finance & Tax
Salary math applies employee FICA first (OASDI 6.2% up to the 2026 SSA wage base of $184,500, plus Medicare 1.45% with no cap), then a separate federal + state withholding estimate. Budget tools split that net—not offer-letter gross.
Compound Growth
Savings calculations use the monthly compounding interest formula (n=12), allowing for monthly contributions and realistic year-end APY projections.
Sizing Standards
TV and Monitor viewing distances are based on SMPTE (Society of Motion Picture and Television Engineers) and THX standards for optimal field of view (30-40 degrees).
Unit Price Math
Calculations are resolved to the 4th decimal place. We normalize all inputs to a unified base (ounces, grams, or counts) to strip away deceptive packaging math.
Real-Time Odds
Lotto generators use a cryptographically secure pseudo-random number generator (CSPRNG) to simulate the true mathematical probability of specific draw formats.
Privacy First
No server-side processing. Your financial data is computed entirely in your browser's V8 engine and stored only in your local instance.
Transparency
is our priority.
No black-box tax APIs. FICA rates and the wage base are documented here.
Each page lists accessed-at dates when official figures change.
Calculations run in the browser. We do not store your income on a server.
Corrections: email showhanda86@gmail.com.
Our Data Sources
We don't guess. Our tools are hard-coded with values from the highest authorities in finance and technology. Here are the primary data sets used for our 2026 calibrations:
Numbers worth knowing
$184,500
2026 SSA OASDI wage base
Source: SSA contribution and benefit base
7.65%
Employee FICA below the wage base
Source: IRS Topic 751
Frequently Asked Questions
- What is the Paycheck Reality Standard?
- An original Save-Check planning order: estimate net after employee FICA, then withholding, then leftover. We do not budget on offer-letter gross.
- Where do tax numbers come from?
- Employee FICA rates follow IRS Topic 751. The 2026 Social Security wage base is $184,500 per the SSA contribution and benefit base. Federal/state withholding is a slider estimate, not your W-4.
- Are results guaranteed accurate?
- No—calculators are educational estimates. Rounding, local rules, and employer-specific deductions can change your real numbers.
References
- SSA — Contribution and Benefit Base(accessed 2026-09-14)
- IRS Topic 751(accessed 2026-09-14)
- SMPTE Standards(accessed 2026-06-12)