How to Calculate Your Retirement Number and Assess Readiness
How much you need to retire depends largely on what you expect to spend and how much of that spending will be covered by Social Security, pensions, and other income. Your retirement number estimates the savings and investments that may be needed to fund the remaining gap. It is a useful planning reference, but it is only one part of assessing whether your finances are prepared for retirement.
Key Takeaways
A retirement number should reflect the retirement you are actually planning rather than a general savings benchmark. Because several parts of the calculation can change, it is usually more useful to work with a range than a single dollar amount.
Estimate your expected annual retirement spending, including taxes, health care, and occasional large expenses.
Add up expected income from sources such as Social Security, pensions, and other recurring income.
Subtract that income from projected spending to determine how much your savings may need to provide.
Test the result under different assumptions for retirement timing, inflation, longevity, taxes, and investment performance.
Compare the estimated range with the resources you expect to have when you retire.
The calculation can help identify which parts of your plan are already taking shape and which assumptions need more attention. As retirement gets closer, the estimate can be updated with better information.
What Your Retirement Number Actually Tells You
A retirement number is an estimate of the assets needed to support the portion of your future spending that will not be covered by other income.
That distinction matters because retirement readiness is not simply a question of reaching a certain account balance. Two households with the same amount saved can have very different needs based on their spending, debt, Social Security benefits, pensions, taxes, health care costs, housing plans, and other financial obligations.
A broader readiness review also considers cash reserves, insurance, near-term expenses, and how much flexibility exists in the household budget. The goal is to understand how your financial resources may support retirement, not simply whether you have crossed a particular savings threshold.
Step 1: Build a Realistic Estimate of Retirement Spending
Current spending is a practical place to begin. From there, consider what is likely to change after you stop working.
Some commuting or payroll-related costs may decline, while travel, hobbies, health care, or other expenses may rise. Housing costs do not necessarily disappear at retirement, and even a paid-off home may still involve property taxes, insurance, maintenance, and repairs.
It can help to organize expected spending into three groups:
Essential expenses: housing, food, utilities, transportation, insurance, health care, taxes, and other recurring needs.
Flexible expenses: travel, dining, entertainment, hobbies, gifts, and charitable giving.
Occasional expenses: major home repairs, vehicle purchases, family support, and other costs that may not occur every year.
Use annual figures so spending can be compared directly with annual income. Avoid assuming the same budget will apply throughout retirement. Spending patterns can change over time, and health care, family needs, or housing decisions may alter the picture.
Step 2: Account for Income You Expect to Receive in Retirement
Next, identify income that may help cover those expenses without requiring a portfolio withdrawal.
For many households, Social Security and pension benefits are the largest sources. Others may also expect annuity payments, rental income, business income, or earnings from part-time work.
The amount is only part of the calculation. Consider when each source is expected to begin, whether it will continue for life or for a limited period, how it may change over time, and how taxes could affect the amount available for spending.
Timing can make a meaningful difference. Someone who retires before Social Security or a pension begins may have a larger portfolio-funded gap during the first few years of retirement than later on.
Step 3: Calculate the Income Gap Your Savings May Need to Cover
With spending and income estimates in place, the basic calculation is straightforward:
Step | What to Calculate |
1. Estimate annual retirement spending | Add expected recurring and occasional expenses |
2. Estimate annual retirement income | Add Social Security, pension benefits, and other expected income |
3. Calculate the income gap | Subtract expected income from expected spending |
4. Estimate an asset range | Project that gap under several reasonable assumptions |
5. Compare with your resources | Review savings, investments, cash, and other assets intended for retirement |
For example, suppose a household expects to spend $90,000 a year and anticipates $55,000 of annual income from Social Security and pension benefits. That leaves an estimated $35,000 annual gap for savings and investments to support.
The next step is not to attach one standard multiplier or withdrawal percentage to that $35,000. Instead, the gap can be projected under several assumptions for retirement length, inflation, taxes, changing expenses, and investment results. Doing so produces a range of potential asset needs rather than suggesting that one number will work under every set of conditions.
That range can then be compared with retirement accounts, taxable investments, cash reserves, and other resources earmarked for retirement.
If you would like to examine how your spending, income, and savings assumptions work together, contact the office at WealthPartners to discuss the calculation in the context of your broader retirement plan.
Step 4: Test the Assumptions Behind Your Estimate
A retirement projection may appear precise because it ends with a dollar amount. The quality of that estimate depends on the assumptions underneath it.
Retirement timing is one of them. An earlier retirement can increase the number of years a portfolio may need to provide income, while a later retirement may allow additional saving and change the timing of Social Security or pension benefits.
Inflation affects purchasing power, while taxes influence how much of a withdrawal is actually available to spend. Health care costs and the possibility of future long-term support also deserve consideration.
Investment performance adds another variable. Returns can vary considerably from year to year, and the timing of market gains and losses can affect a portfolio differently once withdrawals begin.
Testing more than one reasonable scenario helps show how sensitive your retirement estimate is to these variables. It may also reveal where you have room to adjust if circumstances change.
Step 5: Compare the Estimate With the Resources You Have
Once you have an estimated asset range, compare it with what you have accumulated and what you expect to save before retirement.
A close comparison does not automatically mean the plan is complete, just as a projected gap does not point to a single solution. The next step is to understand what is driving the result.
Possible adjustments may include saving more, revisiting the retirement date, changing planned spending, reconsidering housing decisions, or earning some income during retirement. These are planning choices with different tradeoffs, not interchangeable fixes.
It is also worth reviewing debt, emergency reserves, insurance, and cash needed for near-term expenses. A household can have substantial long-term assets and still need a thoughtful plan for managing short-term cash flow.
Common Mistakes When Calculating a Retirement Number
Retirement estimates become less useful when important assumptions are left out or treated too simply.
Starting with a generic savings multiple can overlook the household's actual spending and income. Leaving out taxes, inflation, health care, or major irregular expenses can understate future needs. Similarly, treating all projected income as equally reliable can make the income side of the calculation look stronger than it may be.
Other common issues include using one investment-return assumption, overlooking the years before Social Security or pension income begins, or assuming retirement spending will remain level indefinitely.
For couples, the calculation should account for both people and how income or expenses may change over time. Home equity also needs context. It may be an important resource, but it should not be treated as spendable retirement assets unless there is a plan for how it would be used.
Revisit Your Number as Retirement Gets Closer
A retirement estimate prepared several years in advance will contain more assumptions than one prepared near the retirement date. Updating it periodically allows estimates to be replaced with current information.
Recent spending can improve the retirement budget. Updated Social Security and pension estimates can refine projected income. Current account balances, housing plans, family responsibilities, and health care expectations can change the amount your portfolio may need to support.
The purpose of revisiting the calculation is not to find a permanently correct number. It is to keep your plan connected to your actual circumstances as retirement approaches.
Frequently Asked Questions About Calculating Your Retirement Number
The calculation itself is only the beginning. Several practical questions often come up as people move from a rough savings target to a more complete retirement plan.
Should I Include My Mortgage in My Retirement Expenses?
Yes, if you expect to have mortgage payments after retirement. Housing costs should reflect the expenses you realistically expect to have, including mortgage payments when applicable, property taxes, insurance, maintenance, and other ongoing costs.
What if Social Security or Pension Income Starts After I Retire?
Your calculation can account for different periods of retirement separately. The amount your portfolio needs to provide may be higher before Social Security or pension income begins and lower afterward.
Does Home Equity Count Toward My Retirement Number?
Home equity may be part of your overall financial resources, but its role depends on whether you expect to use it to help fund retirement. Counting the full value without a plan for accessing it can overstate the assets available for spending.
How Should Couples Calculate a Retirement Number?
Couples should consider both partners' expected retirement dates, income sources, spending needs, health care costs, and longevity. Household income and expenses may also change when one spouse retires before the other or after one spouse dies.
How Often Should I Update My Retirement Number?
Reviewing the calculation periodically can be useful, particularly as retirement approaches or after significant changes in spending, income, account values, housing, health, or family responsibilities. The estimate should become more grounded in current information over time.
Use the Number to Build a More Complete Retirement Plan
To estimate how much you may need to retire, begin with expected annual spending, subtract the income you expect from Social Security, pensions, and other sources, and determine the remaining amount your savings may need to provide. Then test that gap under different assumptions and compare the resulting range with the assets you expect to have available.
That process provides more useful information than aiming for a universal savings target. Retirement readiness also depends on taxes, health care, cash flow, investment uncertainty, and the flexibility to adjust as circumstances change.
If retirement is approaching and you want to review how these pieces fit together, get in touch with the office to discuss your assumptions, available resources, and broader retirement plan.