When it comes to retirement planning, "How much do I need?" is the million-dollar question—sometimes quite literally.
The truth is, there is no single "magic number" that works for everyone. The amount you need to save depends entirely on how you want to live and when you plan to stop working.
However, you don't have to guess. By understanding a few simple financial models, you can calculate an accurate target for your own lifestyle. In this guide, we'll break down the most reliable rules of thumb and show you how to find your target number using our **Free Retirement Calculator**.
The Rule of 25 (The 4% Rule)
If you only remember one concept from this guide, make it The Rule of 25.
Originating from the famous "Trinity Study," the Rule of 25 states that to retire comfortably, you need to save 25 times your anticipated annual retirement expenses.
Once you have that amount saved and invested optimally, you can theoretically withdraw 4% of your portfolio every year (adjusted for inflation) without ever running out of money over a 30-year retirement.
How to Calculate It
In this scenario, your target retirement number is $1.5 million.
The Fidelity Age-Based Benchmarks
If multiplying your expenses by 25 feels too abstract, Fidelity Investments created a popular age-based rule of thumb based on your current salary.
They recommend striving to save the following multiples of your salary by these specific age milestones:
* Age 30: 1x your starting salary
* Age 40: 3x your salary
* Age 50: 6x your salary
* Age 60: 8x your salary
* Age 67: 10x your salary
Example: If you earn $80,000 a year, the goal is to have $80,000 saved by age 30, $240,000 by age 40, and $800,000 by age 67.
Note: This benchmark assumes you will also receive Social Security benefits and that you plan to retire at a traditional age. If you plan to retire much earlier (like in the FIRE movement), these benchmarks won't apply to you.
The 80% Replacement Rate Rule
Another common method financial advisors use is the 80% rule. This suggests that you'll need to generate 80% of your pre-retirement income to maintain your standard of living after you stop working.
Why 80% and not 100%? Because in retirement, you're no longer paying payroll taxes, you're no longer saving for retirement, and work-related expenses (commuting, professional wardrobes) disappear.
How to Calculate It
If your final salary before retirement is $100,000, you should aim to generate $80,000 a year in retirement.
You can subtract expected Social Security or pension income from that $80,000. If Social Security covers $25,000, you only need your portfolio to generate $55,000 a year. (Applying the Rule of 25 to that $55,000 gives you a target portfolio of $1.375 million).
Variables That Change Your Target
Before you lock in your target number, consider these crucial wildcards:
1. Healthcare Costs
Healthcare is often the largest expense in retirement, especially if you retire before Medicare kicks in at age 65. Even with Medicare, premiums, copays, and out-of-pocket costs can easily exceed $300,000 over a couple's retirement years.
2. Inflation
A dollar today will buy much less 20 years from now. When projecting your future expenses, you must account for an average of 2.5% to 3% annual inflation.
3. Early Retirement (FIRE)
The Rule of 25 (the 4% rule) assumes a 30-year retirement. If you plan to retire at 45 and need your money to last 40 or 50 years, you need to be more conservative. Many early retirees use a multiplier of 30x to 33x their annual expenses (which equates to a 3% or 3.3% withdrawal rate).
How to Get Started Today
The sheer size of a retirement target (often crossing into the millions) can be paralyzing. The secret is to stop looking at the top of the mountain and just calculate your next step.
Here is what you should do right now:
The best day to start saving for retirement was 20 years ago. The second best day is today. You'll be amazed at what compound interest can do over the long haul.