Retirement & Super Calculators
Precision nest egg accumulation, Australian Superannuation guarantees, 401(k) matching, Social Security curves, Roth conversions, and Trinity Study safe withdrawal models.
Retirement & Super Trajectory Engine
Core Retirement & Nest Egg Models
10 ToolsRetirement Calculator
Full multi-pillar nest egg longevity forecast.
Retirement Corpus Tool
Target lump sum required at date of retirement.
Retirement Income Forecaster
Monthly passive drawdown supported by capital.
Retirement Age Solver
Calculate earliest viable retirement date based on savings.
Retirement Savings Rate Tool
Optimal paycheck percentage to achieve financial freedom.
Retirement Deficit Check
Shortfall diagnostic between current pacing and target.
Retirement Lifestyle Budget
Cost modeling for travel, hobbies, healthcare and housing.
Monte Carlo Retirement Engine
Probability distribution over 1,000 market scenarios.
Terminal Nest Egg Tool
Capital preservation and generational legacy estimator.
Inflation-Adjusted Retire Model
Future purchasing power expressed in today's dollars.
Superannuation & Australian ATO Suite
10 ToolsSuperannuation Calculator
Simulate SG compound growth to preservation age 60.
Salary Sacrifice Super Tool
15% concessional tax arbitrage vs personal marginal tax.
Super Guarantee (SG) Tool
Mandatory employer 11.5% to 12% statutory calculations.
Concessional Cap Checker
Track $30,000 annual concessional limit & 5-year carry.
Non-Concessional Cap Tool
$120,000 post-tax contribution & 3-year bring-forward.
Super Consolidation Tool
Evaluate fee savings and insurance loss from account merging.
Government Co-Contribution
Low-income matching grant up to $500 calculator.
Transition to Retirement (TTR)
Access super pension while working reduced hours.
Account-Based Pension Drawdown
Minimum statutory decumulation percentage by age tier.
SMSF Cost & Yield Analyzer
Self-Managed Super Fund cost-benefit break-even analyzer.
401(k), 403(b) & Defined Contribution
10 Tools401(k) Growth Calculator
Pre-tax payroll deferral compounding over 30+ years.
401(k) Match Optimizer
Capture 100% employer match dollar-for-dollar.
Roth 401(k) vs Traditional
Compare upfront tax deduction vs tax-free distribution.
403(b) Educator Planner
Non-profit and healthcare retirement plan projection.
457(b) Deferred Comp Tool
Government plan penalty-free separation withdrawals.
401(k) Catch-Up Limit Tool
Age 50+ and SECURE 2.0 extra contribution caps.
401(k) Loan Payoff Model
Assess opportunity cost of borrowing against 401(k).
401(k) Fee Drag Analyzer
Impact of 1% admin and sub-advised mutual fund fees.
Solo 401(k) Self-Employed
Employee deferral + employer profit share calculations.
SEP IRA vs Solo 401(k)
Small business owner maximum tax deduction comparison.
FIRE Movement & Early Retirement
10 ToolsFIRE Master Calculator
Comprehensive early retirement horizon forecaster.
Lean FIRE Calculator
Minimalist sub-$45,000 annual spend target modeling.
Fat FIRE Calculator
Affluent early retirement with $120k+ yearly budget.
Coast FIRE Calculator
Age at which zero further contributions are needed.
Barista FIRE Calculator
Part-time job healthcare bridge & supplement modeling.
FIRE Number Calculator
Exact 25x and 30x liquid portfolio milestone solver.
FIRE Progress Tracker
Percentage completed towards total financial autonomy.
72(t) SEPP Early Access
Substantially equal penalty-free pre-59½ distributions.
Rule of 55 Calculator
Access current 401(k) penalty-free upon age 55 exit.
Financial Independence Index
Crossover velocity where investment returns exceed salary.
Social Security & State Pensions
10 ToolsSocial Security Estimator
Full Retirement Age (FRA) monthly benefit curve model.
Age 62 vs 70 Claiming Tool
Actuarial cumulative break-even age for delayed claiming.
Spousal Social Security
Calculate 50% spousal benefit and survivor options.
AU Age Pension Asset Test
Taper rate reductions based on homeowner status and assets.
AU Age Pension Income Test
Deeming rate threshold calculator on liquid savings.
UK State Pension Forecaster
35 qualifying National Insurance years validation.
Canada CPP & OAS Optimizer
Canada Pension Plan and Old Age Security clawback.
WEP & GPO Impact Tool
Windfall Elimination for public servants and teachers.
Social Security Taxability
Combined provisional income tax tiers (50% & 85%).
COLA Adjustment Forecaster
Historical and future CPI-W cost-of-living adjustments.
Drawdown, SWR & Decumulation
10 ToolsSafe Withdrawal Rate (SWR)
Bengen 4% rule survival probability across 30-50 years.
Guyton-Klinger Guardrails
Dynamic capital preservation withdrawal adjustments.
Required Minimum Distribution
IRS Uniform Lifetime Table RMD solver for age 73+.
Variable Percentage Drawdown
Portfolio percentage spending with floor & ceiling rules.
Annuity vs 4% Drawdown
Compare guaranteed lifetime payout against stock index.
Portfolio Longevity Tool
Simulate exact age when capital reaches $0 under volatility.
3-Bucket Strategy Model
Cash buffer, bond bridge, and equity compounding buckets.
Capital Depletion Curve
Visual decumulation tracking under adverse market returns.
Tax-Efficient Drawdown Order
Optimal sequence: Taxable → Pre-Tax → Roth IRAs.
Floor & Ceiling Guardrails
Protect lifestyle spending during severe economic shocks.
Roth Conversions & Tax Shelters
10 ToolsRoth Conversion Ladder
5-year seasoned penalty-free early access ladder.
Backdoor Roth IRA Tool
High-income non-deductible to Roth conversion.
Mega Backdoor Roth Model
After-tax 401(k) in-plan conversion up to $70,000.
Pro-Rata Rule Calculator
Determine taxable portion of backdoor conversions.
HSA Stealth Retirement
Triple-tax advantaged healthcare nest egg growth.
Traditional vs Roth IRA
Current marginal rate vs expected retirement bracket.
Bracket Bumping Optimizer
Convert up to standard 22% or 24% bracket boundary.
Roth 5-Year Rule Tracker
Track seasoning timelines for earnings vs conversions.
Inherited IRA 10-Year Rule
SECURE Act mandatory depletion schedule solver.
QCD Charitable Distributer
Direct tax-free RMD donation to charitable 501(c)(3).
Defined Benefit & Pensions
10 ToolsPension Annuity Calculator
Single life vs joint & survivor monthly cash flow.
Lump Sum vs Pension Tool
Evaluate discounted NPV of lump sum buyout offers.
Defined Benefit Formula
Final average salary × service years × multiplier.
FERS Federal Retirement
Federal Employee Retirement System annuity + supplement.
Military Pension (BRS)
Blended Retirement System 20-year active duty solver.
Teachers Pension (STRS)
State Teachers Retirement System formula and COLA.
Pension Commutation Tool
Tax consequences of commuting pension to lump sum.
COLA Inflation Drag Tool
Measure purchasing power loss on non-indexed pensions.
Corporate Pension Solvency
PBGC guarantee limits and plan funded status check.
Fixed Indexed Annuity Tool
Cap rates, participation rates and principal protection.
Longevity, Sequence of Returns & Risk
8 ToolsSequence of Returns Risk Tool
Simulate early bear market crash during retirement years 1-5.
Bond Tent Glidepath Model
Temporary bond allocation surge to protect transition.
Actuarial Life Expectancy
Society of Actuaries mortality tables by lifestyle tier.
Target Date Glidepath Tool
Evaluate equity descent curves across leading index funds.
Dynamic Asset Allocation
Age-adjusted stock, bond, and cash rebalancing rules.
Cash Buffer Reserve Tool
1-3 years liquid spending buffer to avoid selling lows.
Rising Equity Glidepath
Kitces & Pfau inverted equity glidepath model.
Joint Life Probability Tool
Odds of at least one spouse surviving past age 90 or 95.
Healthcare, Medicare & Relocation
7 ToolsMedicare Part B & D IRMAA
Income-Related Monthly Adjustment Amount surcharges.
Retirement Healthcare Bridge
ACA health insurance subsidies before Medicare age 65.
Long-Term Care Cost Model
Assisted living & memory care expense forecasts.
Spending Smile Curve Model
Blanchett spending decline from Go-Go to Slow-Go years.
State Retirement Tax Map
State income, pension and Social Security tax exemption rules.
Reverse Mortgage Evaluator
HECM line-of-credit volatility buffer model.
Retirement Relocation Index
Cost of living and property tax savings by destination.
Retirement Head-to-Head Comparisons
Rigorous empirical trade-offs resolving classic decumulation, pension, and account structure dilemmas.
401(k) vs. Australian Super
US 401(k) relies on voluntary payroll deferrals with employer matching, taxed at ordinary income rates on withdrawal. Australian Superannuation enforces a mandatory 11.5% SG employer contribution, taxed at 15% upon entry and 0% tax-free in the pension decumulation phase after age 60.
Roth IRA vs. Traditional 401(k)
Traditional pre-tax contributions shelter dollars at your current highest marginal tax rate. Roth post-tax dollars enter after today's tax rate but ensure zero tax on decades of compound earnings and zero tax on withdrawals. If your tax rate now exceeds your future retirement rate, Traditional mathematically wins.
4% SWR vs. Lifetime Annuity
The 4% SWR preserves capital upside and estate legacy, but exposes the retiree to market downturns and Sequence of Returns Risk. Fixed annuities transfer longevity risk to insurance carriers providing guaranteed monthly income for life, but permanently forfeit principal and legacy inheritance.
Social Security at Age 62 vs. 70
Claiming early at age 62 permanently reduces monthly benefits by up to 30%. Delaying until age 70 generates an 8% annual guaranteed delayed retirement credit boost (124% to 132% of primary insurance amount). The actuarial cumulative break-even age is approximately 80.5 years.
Lump Sum vs. Monthly Pension
Lump sum buyouts grant complete investment autonomy and estate survivorship, but require achieving an internal rate of return (discount rate) higher than the pension plan's corporate yield assumption (typically 5.5% - 6.5%) without succumbing to market volatility.
Traditional (65) vs. Early FIRE (45)
Traditional 30-year retirements utilize Bengen's 4% rule with government pensions buffering drawdowns. A 45-year FIRE horizon faces extreme 50-year sequence of returns risk, requiring a lower safe withdrawal rate (3.25% - 3.50%) and a larger 30x to 33x expense corpus multiplier.
Foundational Actuarial Formulations
SolveIt retirement calculators execute closed-form recurrence models compliant with IEEE 754 floating-point precision and actuarial standard practices.
Where PV is existing Super/401(k) balance, r is net investment return, n is total months to retirement, and PMT is total employee + employer monthly contribution.
At a standard 4.0% SWR, 1 / 0.04 = 25 (the 25x rule). For conservative 3.33% early FIRE horizons, 1 / 0.0333 = 30 (the 30x rule). Guaranteed Social Security offsets directly lower the required corpus.
Discounts nominal future currency by compound inflation rate i across horizon t in years, establishing the exact real purchasing power of your retirement drawdown.
Mandatory annual withdrawal amount derived from IRS Table III (Uniform Lifetime). Starting at age 73 (Distribution Period = 26.5), scaling annually to prevent indefinite tax deferral.
Retirement Sub-Directory Hubs
Super & 401(k) Schedules
FIRE & Early Drawdown
Authoritative Actuarial Direct Answers
How does Australian Superannuation compound?
Australian Superannuation compounds within a concessional tax-sheltered environment where investment earnings are taxed at a maximum statutory rate of 15% (reduced to 10% for capital gains held over 12 months). Upon reaching preservation age (60) and entering the retirement pension phase, all investment earnings, capital gains, and withdrawals become 100% tax-free up to the transfer balance cap ($1.9M in FY25).
Is the 4% Safe Withdrawal Rule still valid?
The Bengen 4% Rule states that withdrawing 4% of a portfolio in year one, adjusted annually for inflation, has a 95%+ historical survival rate over a standard 30-year retirement. For early retirees facing 40 to 50-year horizons, modern actuarial models recommend dynamic guardrails (such as Guyton-Klinger) or a baseline 3.25% - 3.50% initial withdrawal rate to eliminate sequence of returns exhaustion.
Salary Sacrifice vs. After-Tax Investing
Salary sacrifice directs pre-tax salary into superannuation taxed at only 15%, capturing an immediate tax arbitrage saving of 17.5% to 32% compared to personal marginal tax brackets (32.5% to 47%). For high earners, this provides an immediate boost to starting compound capital that surpasses standard taxable index funds.
Retirement & Superannuation FAQ
Everything you need to know regarding superannuation guarantee rates, 401(k) matching, safe decumulation rates, and early access rules.
What is the current Australian Superannuation Guarantee (SG) rate?expand_more
What is the maximum annual contribution cap for Superannuation in Australia?expand_more
What is the 401(k) contribution limit for 2025 in the United States?expand_more
How do I calculate my required retirement nest egg (FIRE Number)?expand_more
What is Sequence of Returns Risk (SRR) and how can it be mitigated?expand_more
What is the Australian Super preservation age?expand_more
Can I access my 401(k) or Super before the standard retirement age?expand_more
How does Social Security taxation work in retirement?expand_more
What is a Roth Conversion Ladder?expand_more
What is the difference between Defined Benefit and Defined Contribution pensions?expand_more
Institutional Actuarial Review & Statutory Disclosures
The algorithmic models, decumulation simulations, and superannuation formulations hosted within the SolveIt Retirement & Super suite undergo continuous mathematical audits by credentialed actuaries and certified financial planners.
Dr. Arthur Sterling, CFA, CFP®
Chief ActuaryFormer Quantitative Research Director, Vanguard Fixed Income Group. PhD in Financial Econometrics, University of Chicago Booth School.
Elena Rostova, CPA, PFP®
Tax & Super SpecialistSpecialist in Australian ATO Superannuation Guarantee compliance, US Section 72(t) distributions, and international pension transfers.
Regulatory Disclosure: Computational workbenches provided by SolveIt Precision Utilities are engineered exclusively for analytical, educational, and self-directed modeling purposes under SEC Rule 204, FINRA Rule 2210, and ASIC Regulatory Guide 244 guidelines. These models do not constitute personalized financial product advice, tax consultation, or actuarial endorsements.
Arithmetic Integrity: Calculations comply with standard IEEE 754 binary floating-point representation. Inflation adjustments utilize the geometric Fisher formulation. Compounding algorithms assume end-of-period cash flows (annuity immediate) unless explicitly configured otherwise.