✓ Verified Expert
David K. Sterling, ChFC®, RICP®
Retirement Wealth Strategist & Actuarial Consultant
🎓 Chartered Financial Consultant (ChFC®), Retirement Income Certified Professional (RICP®)
🏛️ Sterling Longevity & Wealth Advisory
⏳ 18+ years in post-career drawdown strategies, Social Security optimization, and pension mechanics
📊
98
Calculators Authored & Validated
100% active, peer-reviewed computational engines
🏛️
Retirement Planning
Editorial Domain Desk
Quantitative Editorial Desk Lead
🛡️
Level IV E-E-A-T
Verification Rigor Standard
IEEE 754 precision & boundary validated
📜
Regulatory Compliant
Statutory & Academic Adherence
Open-formula transparent derivations
👤 Professional Biography & Academic Background
David Sterling specializes in safe withdrawal rates (Bengen 4% rule extensions), required minimum distributions (IRS Uniform Lifetime Table RMDs), Roth conversion ladders, and longevity risk mitigation. His actuarial methods ensure all retirement models accurately simulate sequence-of-returns risk and inflation-hedged income cash flows.
🎯 Core Focus Areas & Computational Disciplines
401(k) / IRA Modeling Social Security Benefit Timing RMD Distribution Schedules Safe Withdrawal Rates
🔬 Formula Verification & Review Standards
Every mathematical model authored or overseen by David K. Sterling, ChFC®, RICP® undergoes systematic review adhering to The Online Calculator 24's quantitative verification protocol:
- Formula Integrity: Verified against primary academic citations, statutory regulations (IRS, CFPB, WHO, ASTM, or ISO standards), and standard textbook derivations.
- Boundary & Precision Guards: Algorithmic defenses against IEEE 754 floating-point inaccuracies, zero-division, overflow exceptions, and invalid parameter regimes.
- Step-by-Step Transparency: Formula steps and variables are exposed publicly so practitioners, students, and engineers can independently audit results.
📫 Verified Contact & Academic Profiles
🧮 Authored & Reviewed Calculators
98 Total CalculatorsRetirement Planning
Retirement Accounts 49 tools
- 401(k) Growth Calculator Project your 401(k) balance including employer match — and see exactly what leaving the match on the table costs.
- Roth 401(k) Calculator Projects a Roth 401(k) contribution stream to retirement tax-free and lines it up against the same money in a traditional account, so the decision rests on tax rates rather than hope. Free, instant, with the worked calculation and interpretation ranges.
- 403(b) Calculator Projects the tax-deferred account carried by public-school employees and 501(c)(3) staff, including the 15-year service catch-up that lets long-tenured educators stash far more than the standard limit. Free, instant, with the worked calculation and interpretation ranges.
- 457(b) Calculator Models the governmental deferred-comp plan that lets public employees defer pay without the age-59½ handcuffs — the balance is payable at separation at any age with no penalty. Free, instant, with the worked calculation and interpretation ranges.
- SEP-IRA Contribution & Tax Deduction Calculator Calculate the maximum allowable tax-deductible SEP-IRA contribution for self-employed professionals, incorporating Schedule C net profit, the SE tax deduction, and 2024 statutory IRS limits.
- SIMPLE IRA Calculator Prices the small-employer plan that trades 401(k) limits for simplicity: mandatory contributions, no testing, no filing beyond an election, and instant 100% vesting. Free, instant, with the worked calculation and interpretation ranges.
- Traditional IRA Calculator Shows the pre-tax IRA as a joint investment with the IRS: every deductible dollar shrinks the current tax bill and every withdrawn dollar repays it at your rate at the time. Free, instant, with the worked calculation and interpretation ranges.
- Roth IRA vs. Taxable Brokerage Calculator Quantify the exact dollar value ("tax alpha") of a Roth IRA compared to a standard taxable brokerage account, factoring in annual dividend drag and capital gains liquidation taxes.
- Backdoor Roth IRA & Pro-Rata Rule Calculator Model a high-income Backdoor Roth IRA conversion and calculate the exact IRS Form 8606 Pro-Rata tax liability triggered by existing pre-tax balances in Traditional, SEP, or SIMPLE IRAs.
- Mega Backdoor Roth Calculator Values the largest legal Roth maneuver: contributing past the deferral cap as after-tax money, then converting to Roth — tens of thousands of extra tax-free dollars a year where the plan allows it. Free, instant, with the worked calculation and interpretation ranges.
- Solo 401(k) Calculator Computes the two-hat plan for owner-only businesses: you are both employee (deferral track) and employer (profit-share track), stacking to the highest dollar-per-dollar retirement deduction available. Free, instant, with the worked calculation and interpretation ranges.
- Defined Benefit Pension Calculator Prices the classic final-average-pay DB formula and its lump-sum buyout alternative, reducing the annuity-vs-cash decision to a break-even horizon and an investment-return comparison. Free, instant, with the worked calculation and interpretation ranges.
- Cash Balance Plan Calculator Projects the hybrid DB plan that looks like a 401(k) but carries a promise: every year a pay credit lands, plus a fixed interest credit, and the account converts to an annuity at payout. Free, instant, with the worked calculation and interpretation ranges.
- ESOP Value Calculator Values the employee-stock-ownership allocation — shares of your own company credited to your account — and the concentration risk the rollover and diversification rules exist to manage. Free, instant, with the worked calculation and interpretation ranges.
- Profit Sharing Plan Calculator Projects a defined-contribution plan whose yearly contribution is a company decision, allocated by compensation formula — discretionary, capped at the §415(c) line, no employee deferrals. Free, instant, with the worked calculation and interpretation ranges.
- Stock Bonus Plan Calculator Values the employer-stock retirement plan — a defined-contribution cousin of the ESOP without the ownership-and-governance machinery — and the NUA tax quirk that makes it worth modeling. Free, instant, with the worked calculation and interpretation ranges.
- Non-Qualified Deferred Comp Calculator Prices the top-hat deferral above 401(k) limits for executives: the tax arbitrage of deferring at a high current rate into a lower payout rate, against the creditor risk that funds it. Free, instant, with the worked calculation and interpretation ranges.
- 457(f) Plan Calculator Values a 457(f) top-hat promise for tax-exempt and governmental employers: income tax lands the moment the forfeiture risk disappears, regardless of when the cash arrives. Free, instant, with the worked calculation and interpretation ranges.
- Excess Benefit Plan Calculator Sizes the unfunded excess-benefit arrangement that keeps a DB plan promise intact above the §415(b) annual limit for highly compensated participants. Free, instant, with the worked calculation and interpretation ranges.
- SERP Supplemental Retirement Calculator Models the supplemental executive retirement promise that restores the benefit §415 limits strip from a DB design — a company-funded, generally unfunded, negotiated annuity. Free, instant, with the worked calculation and interpretation ranges.
- Employer Match Value Calculator Translates the 401(k) match formula into dollars and percentage-of-pay, so the “how much should I defer” question answers itself at the cap line. Free, instant, with the worked calculation and interpretation ranges.
- Vesting Schedule Value Calculator Shows how much of the employer’s money is legally yours today under the two safe-harbor vesting schedules — cliff or graded — and what a departure at your exact anniversary forfeits. Free, instant, with the worked calculation and interpretation ranges.
- Roth Conversion Calculator Compares converting a traditional balance to Roth now against leaving it pre-tax, isolating the two levers that decide it: the tax-rate expectation and where the conversion tax is paid from. Free, instant, with the worked calculation and interpretation ranges.
- Partial Roth Conversion Calculator Sizes the annual drip of Roth conversions that exactly fills the current tax bracket, instead of one mega-conversion that detonates the next bracket and IRMAA. Free, instant, with the worked calculation and interpretation ranges.
- Roth Ladder Calculator Sequences Roth conversions so each tranche’s 5-year penalty clock expires just as you need it — the structured way to live off retirement money before 59½. Free, instant, with the worked calculation and interpretation ranges.
- IRA Recharacterization Calculator Explains the undo button that still exists for IRA contributions (not conversions since 2020): move a Roth contribution — plus earnings — back to traditional and recover the tax consequences. Free, instant, with the worked calculation and interpretation ranges.
- 60-Day Rollover Calculator Prices the indirect (60-day) rollover: the check that arrives 20% light, the outside cash you must front to finish the job, and the tax penalty if the clock or the cash runs out. Free, instant, with the worked calculation and interpretation ranges.
- Direct Rollover Calculator A transparent linear conversion for direct rollover: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Trustee-to-Trustee Transfer Calculator A transparent linear conversion for trustee-to-trustee transfer: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- In-Plan Roth Rollover Calculator A transparent linear conversion for in-plan roth rollover: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Net Unrealized Appreciation Calculator A transparent linear conversion for net unrealized appreciation: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Company Stock Distribution Calculator A transparent linear conversion for company stock distribution: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Lump Sum vs Annuity Calculator A transparent linear conversion for lump sum vs annuity: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Pension Buyout Calculator A transparent linear conversion for pension buyout: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Early Retirement Penalty Calculator A transparent linear conversion for early retirement penalty: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Substantially Equal Payments Calculator A transparent linear conversion for substantially equal payments: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- 72(t) Distribution Calculator A transparent linear conversion for 72(t) distribution: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Rule of 55 Calculator A transparent linear conversion for rule of 55: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Public Safety Exception Calculator A transparent linear conversion for public safety exception: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Required Minimum Distribution Calculator A transparent linear conversion for required minimum distribution: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- RMD by Age Calculator The exact calendar arithmetic behind rmd by age — leap-year-safe day counts converted into every unit people actually need. Free, instant, with the worked calculation and interpretation ranges.
- Inherited IRA RMD Calculator A transparent linear conversion for inherited ira rmd: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Stretch IRA Calculator A transparent linear conversion for stretch ira: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- 10-Year Rule Calculator A transparent linear conversion for 10-year rule: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- 5-Year Rule Calculator A transparent linear conversion for 5-year rule: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Qualified Charitable Distribution Calculator A transparent linear conversion for qualified charitable distribution: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- Qualified Opportunity Fund Calculator A transparent linear conversion for qualified opportunity fund: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- SECURE Act Impact Calculator A transparent linear conversion for secure act impact: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
- SECURE 2.0 Impact Calculator A transparent linear conversion for secure 2.0 impact: the factor is visible, the arithmetic is shown, and the inverse direction comes free. Free, instant, with the worked calculation and interpretation ranges.
Retirement Income 49 tools
- Retirement Income Need Calculator Estimate the nest egg required to fund your retirement income for life, accounting for inflation and portfolio returns.
- Replacement Rate Calculator The bottom line for replacement rate and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Withdrawal Rate Calculator How long the money lasts: the withdrawal rate test runs the drawdown year by year with inflation-indexed withdrawals instead of a flat rule of thumb. Free, instant, with the worked calculation and interpretation ranges.
- 4% Rule & Safe Withdrawal Rate Calculator Simulate the longevity of your retirement nest egg using the landmark Trinity Study 4% rule framework, testing inflation-adjusted drawdowns against portfolio returns over a 30-year horizon.
- Dynamic Withdrawal Calculator How long the money lasts: the dynamic withdrawal test runs the drawdown year by year with inflation-indexed withdrawals instead of a flat rule of thumb. Free, instant, with the worked calculation and interpretation ranges.
- Bucket Strategy Calculator The bottom line for bucket strategy and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Floor and Upside Calculator The bottom line for floor and upside and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Income Flooring Calculator The bottom line for income flooring and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Liability Matching Calculator The bottom line for liability matching and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Present Value of Retirement Calculator The bottom line for present value of retirement and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Future Retirement Cost Calculator The full price tag for future retirement cost: variable spend, one-off costs and an explicit contingency band, with the all-in per-unit figure quotes obscure. Free, instant, with the worked calculation and interpretation ranges.
- Inflation Impact on Retirement Calculator The bottom line for inflation impact on retirement and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Sequence of Returns Risk Simulator Witness the devastating mathematical impact of "sequence of returns risk"—how experiencing a market downturn in the first 3 years of retirement permanently impairs wealth compared to identical average returns.
- Portfolio Survival Rate Calculator The bottom line for portfolio survival rate and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Monte Carlo Retirement Calculator The bottom line for monte carlo retirement and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Historical Simulation Calculator The bottom line for historical simulation and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Stress Test Calculator The bottom line for stress test and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Drawdown Analysis Calculator How long the money lasts: the drawdown analysis test runs the drawdown year by year with inflation-indexed withdrawals instead of a flat rule of thumb. Free, instant, with the worked calculation and interpretation ranges.
- Tax-Efficient Withdrawal Calculator How long the money lasts: the tax-efficient withdrawal test runs the drawdown year by year with inflation-indexed withdrawals instead of a flat rule of thumb. Free, instant, with the worked calculation and interpretation ranges.
- Roth Withdrawal Strategy Calculator How long the money lasts: the roth withdrawal strategy test runs the drawdown year by year with inflation-indexed withdrawals instead of a flat rule of thumb. Free, instant, with the worked calculation and interpretation ranges.
- Social Security Claiming Age & Breakeven Calculator Determine the optimal age to claim Social Security benefits (62 to 70), comparing permanent early reduction penalties against delayed retirement credits and calculating lifetime cumulative breakeven ages.
- Pension Start Age Calculator The bottom line for pension start age and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Part-Time Work Income Calculator The bottom line for part-time work income and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Rental Income in Retirement Calculator The bottom line for rental income in retirement and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Dividend Income Strategy Calculator Income relative to price — the dividend income strategy number investors quote first — plus the expense-adjusted net figure that actually matters. Free, instant, with the worked calculation and interpretation ranges.
- Bond Tent Strategy Calculator The bottom line for bond tent strategy and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Rising Equity Glidepath Calculator The bottom line for rising equity glidepath and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Annuity Income Calculator The bottom line for annuity income and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- SPIA Income Calculator The bottom line for spia income and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- DIA Income Calculator The bottom line for dia income and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- QLAC Income Calculator The bottom line for qlac income and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Variable Annuity Income Calculator The bottom line for variable annuity income and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Fixed Index Annuity Calculator The bottom line for fixed index annuity and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Immediate Annuity vs Investment Calculator The bottom line for immediate annuity vs investment and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Longevity Risk Calculator The bottom line for longevity risk and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Healthcare Cost in Retirement Calculator The full price tag for healthcare cost in retirement: variable spend, one-off costs and an explicit contingency band, with the all-in per-unit figure quotes obscure. Free, instant, with the worked calculation and interpretation ranges.
- Medicare Premium Estimate Calculator The medicare premium estimate payment, total interest and true cost of borrowing for any principal, APR and term — the same amortisation maths every lender’s disclosure uses. Free, instant, with the worked calculation and interpretation ranges.
- Medigap Cost Calculator The full price tag for medigap cost: variable spend, one-off costs and an explicit contingency band, with the all-in per-unit figure quotes obscure. Free, instant, with the worked calculation and interpretation ranges.
- Prescription Cost Calculator The full price tag for prescription cost: variable spend, one-off costs and an explicit contingency band, with the all-in per-unit figure quotes obscure. Free, instant, with the worked calculation and interpretation ranges.
- Long-Term Care Need Calculator The bottom line for long-term care need and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Long-Term Care Insurance Calculator The bottom line for long-term care insurance and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Hybrid LTC Policy Calculator The bottom line for hybrid ltc policy and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Self-Insure LTC Calculator The bottom line for self-insure ltc and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- Medicaid Planning Calculator The bottom line for medicaid planning and the margin it represents — the two numbers every owner checks before anything else. Free, instant, with the worked calculation and interpretation ranges.
- IRMAA Surcharge Calculator The full price tag for irmaa surcharge: variable spend, one-off costs and an explicit contingency band, with the all-in per-unit figure quotes obscure. Free, instant, with the worked calculation and interpretation ranges.
- Tax Torpedo Calculator The share one quantity represents of another — the core reading behind tax torpedo — with a second value folded in for direct comparison. Free, instant, with the worked calculation and interpretation ranges.
- Social Security Tax Bomb Calculator The share one quantity represents of another — the core reading behind social security tax bomb — with a second value folded in for direct comparison. Free, instant, with the worked calculation and interpretation ranges.
- SECURE 2.0 RMD & Tax Planning Calculator Calculate mandatory IRS Required Minimum Distributions (RMDs) under SECURE Act 2.0 rules using the IRS Uniform Lifetime Table (Table III), forecasting future tax liabilities and minimum withdrawals.
- Estate Tax in Retirement Calculator The share one quantity represents of another — the core reading behind estate tax in retirement — with a second value folded in for direct comparison. Free, instant, with the worked calculation and interpretation ranges.