Most people know they should invest, but the question of how much stops them before they open a brokerage account. Getting this number right, or at least close to it, is the difference between building real wealth over time and letting inflation quietly erode what you save.
How much should you invest in stocks?
There’s no universal answer, but a practical starting range is 10% to 15% of your after-tax income going toward investment, with the portion going specifically to stocks depending on your age, goals, and comfort with risk.
A common framework is the 50/30/20 rule, which suggests allocating 50% of after-tax income toward essentials, 30% toward discretionary spending, and 20% toward combined savings and investments.
Within this 20%, stocks are not the only option. You also have bonds, real estate funds, and cash savings competing for the same segment.
If you prefer a conservative approach, you can allocate 10% to 15% of your total savings pool to stocks. If you have a longer time horizon and higher risk tolerance, a 25% to 30% equity allocation becomes more defensible.
Start with the basics before choosing a number
Before you settle on a percentage, check two things first.
Your emergency fund should have three to six months in cash or a high-yield savings account before you put meaningful money into the market. Stocks can fall by 20% or more in a recession, and you don’t want to sell at a loss just to cover the costs of car repairs.
Next comes high-interest debt. If you carry credit card balances of 20% or higher, every dollar you pay to those balances earns you a guaranteed return of 20%, which is better than what most stock portfolios produce over the long term.
Once you check these two boxes, you are truly ready to invest.
Age rule of thumb
Your age is one of the simplest inputs to determine how strongly stocks weigh within your portfolio.
A widely used shortcut is to subtract your age from 110, and the result is the percentage of your portfolio that can be reasonably invested in stocks. At age 30, that means about 80% equity. At 55, closer to 55%.
Younger investors with long-term goals can generally absorb more short-term volatility, while conservative investors or those closer to retirement often prefer less volatile options such as bonds or index funds.
The logic is clear and straightforward: a 28-year-old who loses 30% of his stocks in a market crash will have decades before he recovers. The person who retires next year does not.
What does the 15% standard actually mean?
Many financial planners cite 15% of total income as a reasonable long-term investment goal, and even investors who can’t reach that number today can start with whatever is available.
On a $60,000 salary, 15% is $9,000 per year, or $750 per month.
Starting with 25 instead of 35 and investing $200 a month could lead to hundreds of thousands of additional dollars by retirement, thanks to compounding.
This gap increases the longer you wait, which is why starting with even a small amount is more important than waiting until you can invest the “right” amount.
Use tax-advantaged accounts first
Before you open a taxable brokerage account, maximize the accounts that give you a tax break.
The IRS raised the 401(k) contribution limit to $24,500 for 2026, up from $23,500 in 2025, and increased the IRA limit to $7,500. You can check the current limits directly on IRS.gov.
If your employer matches 401(k) contributions, contributing at least enough to get the full match represents an immediate 50% or 100% return on those funds, depending on the matching structure. This comes before any gains in the market.
We’ve compiled the details Best Online Brokers for Index FundsCompare expense ratios and account minimums and choose funds for long-term investors who want to keep costs low.
How do you think about stock allocation within a portfolio?
Investing 15% of your income does not mean putting 15% of your income directly into individual stocks.
Your overall portfolio will likely contain a mix of domestic stock index funds, international funds, bonds, and perhaps REITs. Equity is usually the largest piece, but its amount depends on the time horizon associated with each goal.
The money you need in five years or less shouldn’t be in stocks at all. The market doesn’t care about your timeline, and a bear market before your planned home purchase or college tuition is paid can be devastating.
Funds allocated 20 or 30 years from now can carry a much higher weighting to stocks, because you have the runway to ride out the inevitable down years.
We’ve covered how Build a diversified portfolio from scratchincluding how to balance stocks, bonds, and alternative assets as your account grows.
The argument for starting small
One of the biggest misconceptions about investing in stocks is that you need a large lump sum to get started.
Most major brokerages now offer fractional shares, which allow you to buy part of one share. This means you can own a piece of an S&P 500 index fund for $5.
The key is to find a ratio that helps you achieve your goals without overwhelming your finances, and then gradually increase your contributions as income grows.
If you’re looking for a low-friction way to get started, SoFi Invest lets you get started with as little as $1offers commission-free trades, and gives members access to certified financial planners at no additional cost, which is useful when you’re still discovering the right allocation for your specific situation.
Automate your contributions
The most effective investing habit is to remove the resolution from your monthly routine entirely.
Setting up automatic transfers from your paycheck or checking account means you’ll never have to make an investment decision this month. Money moves around before you have a chance to redirect it toward something else.
The goal is to start with what you can consistently invest after covering essentials, an emergency fund, and any high-interest debt, then automate and gradually increase over time.
Most brokerages allow you to schedule recurring investments in a specific fund on a specific date each month, and you can also review… Best options stock broker To find a platform that makes automation easy and doesn’t offer an account minimum to get started.
