Retirement Income Calculator
Retirement Income Calculator
Combines your FERS pension, TSP withdrawal, Social Security, and FERS Supplement into one projected monthly retirement income. Enter each component (or zero for components that don’t apply to you) to see the full picture.
- FERS pension
- $0 · 0%
- TSP withdrawal
- $0 · 0%
- Social Security
- $0 · 0%
- FERS Supplement
- $0 · 0%
This is a gross income estimate before federal income tax withholding, state tax, Survivor Benefit Plan election, FEHB premiums, FEGLI premiums, and Medicare Part B premiums (if Medicare is taken). Income sources change over time — the FERS Supplement ends at 62, Social Security typically starts at your chosen claiming age, and Required Minimum Distributions affect TSP withdrawals at 73. For a year-by-year projection that models all of these moving parts, request a personalized Federal Retirement Report.
STONEBRIDGE CAPITAL MANAGEMENT • LITTLETON, COLORADO
You’ve earned a federal retirement worth understanding clearly. We help federal employees across the Denver metro area coordinate CSRS, FERS, TSP, FEHB, FEGLI, and Social Security into one clear retirement plan, so you can make confident decisions about when to retire, how your income will work, and how to protect the benefits you’ve earned.
How the Retirement Income Calculator Works
Enter the four monthly income streams that make up federal retirement — your FERS pension, your TSP withdrawal, your Social Security benefit, and the FERS Supplement if you retire before 62 — and the calculator sums them into your projected monthly retirement income. Each input is independent. If a component does not apply to you (for example, no Supplement because you retire at 62 or later), leave it at zero.
The calculator also shows what percentage each source contributes to your total. For most federal retirees, FERS pension and TSP withdrawal each represent a third to a half of total monthly income, with Social Security making up the rest. The FERS Supplement (if you retire before 62) typically replaces a portion of the Social Security gap until you actually claim Social Security.
The result shown is gross income from each source — before federal income tax, Colorado state tax, Survivor Benefit Plan reductions to your pension, FEHB premiums, FEGLI premiums, and any Medicare Part B premiums. After all those reductions, the actual cash deposited each month is typically 20–30% less than the gross number.
This calculator is the simplest expression of federal retirement income — the sum of the parts. The real planning question is which retirement date produces the best total. We help federal employees in the Denver metro area and across the Colorado Front Range model multiple retirement dates side by side in the personalized Federal Retirement Report.
What Your Total Income Estimate Means
Federal retirement income is the sum of four moving parts. Each one has its own rules, its own timing, and its own complications. The calculator gives you the total — but the timing of each piece matters as much as the size.
The FERS pension starts the month after retirement and continues for life with annual COLA adjustments (FERS COLA is partial — 100% of CPI when CPI is 2% or less, but reduced when CPI runs higher). If you elect a Survivor Benefit Plan annuity for your spouse, the standard 10 percent reduction comes off your gross pension every month for life. The number you enter for the pension should be your gross before the SBP reduction.
TSP withdrawals can be structured as a fixed dollar amount per month, a fixed payment schedule based on life expectancy, an annuity purchase, or a series of one-time withdrawals. Traditional TSP withdrawals are taxed as ordinary income; Roth TSP withdrawals are tax-free if you meet the holding period. Required Minimum Distributions begin at age 73 and may force a higher withdrawal than you planned.
Social Security can be claimed any time between age 62 and age 70. Each year you delay past your full retirement age adds about 8% to your monthly benefit (delayed retirement credits). For federal retirees with FERS pension and TSP income covering early-retirement expenses, delaying Social Security to 67 or 70 often produces a meaningfully higher lifetime benefit. For federal employees who want a broader overview of how the pieces fit together, our Federal Retirement Workshop walks through every major federal benefit program in plain language, including the Social Security claiming decision.
For a year-by-year retirement income projection that models all four sources, tax impact, and the changes at age 62 (Supplement ends), age 65 (Medicare), age 67 (full retirement age for Social Security), and age 73 (RMDs), request a personalized Federal Retirement Report. Learn more about our approach and what makes Stonebridge Capital Management different.
What You Get When You Work With Stonebridge
A Personalized Federal Retirement Roadmap
We bring together your pension, TSP, FEHB, FEGLI, survivor benefits, Social Security, and retirement timing into one coordinated retirement plan.
You’ll see where you stand today, the options available to you, your projected retirement income, and a retirement timeline you can move toward with confidence.
Plain-Language Guidance, Not Sales Pressure
Federal retirement is complicated enough without jargon, sales tactics, or manufactured urgency.
We explain your options clearly, answer your questions honestly, and help you understand the trade-offs before making decisions.
Decisions happen at your pace, not ours.
Colorado-Based Federal Retirement Specialists
Stonebridge is based in the Denver metro area and serves federal employees throughout Colorado’s Front Range.
Meet with us in person at our Inverness office or virtually from anywhere in Colorado.
When questions arise, you’ll have a local team you can reach, not a national call center.
Ready to see how the pieces fit together for your specific situation?
Other Federal Retirement Topics We Help With
The federal retirement decisions that drive lasting income are concentrated in a handful of benefit programs. Each has its own complexity, and each matters.
CSRS & FERS Pension Planning
Your federal pension is likely the foundation of your retirement income. Understanding when you can retire, how much income your pension may provide, and how survivor benefit elections affect your family can have a lasting impact on retirement.
We help you evaluate your retirement eligibility, project your pension under different retirement dates, and understand the trade-offs involved in retiring sooner or working longer.
Thrift Savings Plan (TSP) Strategy
For many federal employees, the TSP is their largest retirement asset. Decisions about investments, withdrawals, Roth conversions, and whether to leave funds in the TSP or move them to an IRA can have a significant impact on retirement income and taxes. We help you evaluate your options, understand the trade-offs, and coordinate your TSP strategy with your pension, Social Security, and overall retirement plan.
FEHB and Medicare Coordination
Your FEHB coverage may be one of the most valuable benefits you carry into retirement. Decisions about Medicare enrollment, which FEHB plan to keep, and how your coverage will work alongside Medicare can have a lasting impact on healthcare costs and coverage. We help you understand your options, evaluate the trade-offs, and make informed decisions about healthcare in retirement.
FEGLI Life Insurance Decisions
The life insurance decisions you make before retirement can have long-term consequences for both cost and coverage. As you age, certain FEGLI premiums can increase significantly, making it important to evaluate your options well before retirement. We help you understand your FEGLI elections, compare costs and benefits, and determine whether maintaining FEGLI, reducing coverage, or exploring private insurance alternatives may better support your family’s goals.
FERS Supplement
For eligible FERS retirees, the FERS Supplement can provide an important source of income between retirement and age 62. Understanding whether you qualify, how much you may receive, and how post-retirement earnings can affect the benefit is an important part of retirement planning. We help you evaluate how the FERS Supplement fits into your overall retirement income strategy and retirement timing decisions.
Survivor Benefit Plan
The survivor benefit election you make at retirement can affect both your retirement income and your spouse’s financial security for years to come. Because these decisions can be difficult or costly to change after retirement, they deserve careful consideration. We help you understand the costs, benefits, and trade-offs involved so you can make an informed decision based on your family’s needs and goals.
Social Security Timing for Federal Retirees
When to claim Social Security is one of the most important retirement income decisions you will make. Claiming earlier provides income sooner, while delaying can increase your monthly benefit for life. We help you evaluate your options and coordinate Social Security with your FERS pension and other income sources to create a retirement income strategy designed around your specific situation.
Frequently Asked Questions About Federal Retirement Income
How do I know what to enter for each income source?
For your FERS pension, use the gross monthly annuity (use the FERS Pension Calculator on this site if you need an estimate). For TSP withdrawal, use the sustainable monthly amount based on your balance and retirement horizon (the TSP Withdrawal Calculator can help). For Social Security, use the monthly benefit at the age you plan to claim from your ssa.gov statement.
For the FERS Supplement, use the monthly amount only if you retire before 62 and qualify (the FERS Supplement Calculator can estimate it). Enter zero for any source that doesn’t apply to your situation.
Why doesn’t this calculator account for taxes?
Tax treatment varies by source and by individual situation, which makes a simple deterministic calculator hard to do well. Traditional TSP withdrawals are taxed as ordinary federal and state income, while Roth TSP is tax-free if held more than 5 years. Social Security is partially taxable depending on your provisional income. The FERS pension and Supplement are fully taxable.
The Federal Retirement Report includes a year-by-year after-tax income projection built around your specific federal and Colorado tax situation.
How will my retirement income change after age 62?
Two things change at 62. First, the FERS Supplement ends — if you were receiving it, that source goes to zero. Second, you become eligible to claim Social Security.
Many federal retirees who retire before 62 delay Social Security to full retirement age (typically 67) or even age 70 to maximize the lifetime benefit. The five-to-eight-year gap between the end of the Supplement and the start of delayed Social Security is one of the most important planning windows in federal retirement.
How will my retirement income change at age 73?
At age 73 (rising to 75 over time for younger retirees), Required Minimum Distributions begin on your Traditional TSP and any traditional IRA balances. The IRS dictates a minimum percentage you must withdraw each year based on your life expectancy.
If your planned TSP withdrawal was lower than the RMD, your withdrawal will rise to meet the RMD floor. This can push you into a higher tax bracket and may also increase the portion of Social Security that’s taxable. RMDs are one reason some federal retirees do Roth conversions in the gap years between 62 and 73.
Should I include my spouse’s retirement income too?
This calculator is built for an individual federal employee. If your spouse also has retirement income (a non-federal pension, their own Social Security, IRA withdrawals, etc.), you can add their amounts in any of the four input fields to model your household total — but the labels won’t match perfectly.
A cleaner approach is to run the calculator separately for each of you and sum the totals. The Federal Retirement Report we build is designed for households, not individuals.
What percentage of pre-retirement income should I aim for?
A common rule of thumb is that retirees need 70–80% of their pre-retirement gross income to maintain their lifestyle. For federal retirees with paid-off mortgages, lower commuting and clothing costs, and Medicare at 65, the actual need can be lower.
We typically build retirement income plans targeting an after-tax monthly amount that comfortably covers known expenses with a margin for healthcare, travel, and discretionary spending. The right target is personal — and depends on your specific lifestyle and goals.
Does the calculator account for inflation over time?
No. The amounts shown are in today’s dollars.
The FERS pension receives a partial annual COLA (matching CPI when CPI is at or below 2%, reduced when CPI is higher). Social Security receives a full annual COLA. TSP withdrawals can be inflation-adjusted at your discretion. The FERS Supplement does not adjust.
Over a 30-year retirement, the gap between an inflation-adjusted source (Social Security) and a non-adjusted source (Supplement) becomes meaningful. The Federal Retirement Report models inflation explicitly across the full retirement horizon.
Serving Federal Employees Across The Colorado Front Range
Stonebridge is based in the Denver metro area and works with federal employees throughout Colorado’s Front Range.
Our clients serve in a wide range of federal agencies and organizations across the state, including the Denver Federal Center, VA Eastern Colorado Health Care System, Buckley Space Force Base, the Internal Revenue Service, the United States Mint, NREL, NOAA, NIST, and many others.
We meet with clients in person at our Inverness office and virtually throughout Colorado.
Primary Service Area
Denver · Littleton · Highlands Ranch · Centennial · Lakewood · Englewood · Parker · Castle Rock · Aurora · Arvada · Westminster · Broomfield · Thornton · Wheat Ridge · Golden · Lone Tree
Extended Service Area
Colorado Springs · Boulder · Fort Collins · Loveland · Greeley · Pueblo
Get Your Personalized Federal Retirement Report
The Federal Retirement Report is designed to help you understand where you stand today and what decisions may lie ahead. Built around your service history, benefits, and retirement goals, it provides a personalized analysis of your pension, TSP, healthcare benefits, survivor elections, retirement income, and other key planning considerations.
There is no cost and no obligation. It is simply a practical way to gain clarity before making important retirement decisions.
Related Federal Retirement Resources
Other calculators for federal employees:
- FERS Pension Calculator — estimate your federal annuity
- TSP Withdrawal Calculator — sustainable monthly withdrawals
- FERS Supplement Calculator — bridge income from MRA to age 62
Federal retirement planning by city — the same specialist work in your community:
For a broader overview of our approach, see our federal retirement planning hub.