Whether it's a new vehicle, a home renovation, a dream vacation, or even launching a business, most of us eventually face a major expense that requires intentional planning. Unfortunately, when it comes to saving for a big purchase, many people fall into one of two traps.
- The first is buying the item immediately with borrowed money and paying it off over time. Sometimes the financing carries interest. Other times it's advertised as "zero-percent financing." Either way, it can normalize spending money before you've actually earned it and reinforce a habit that can walk a fine line.
- The second trap is almost the opposite. Instead of buying too soon, many simply wait for an undefined future day when they happen to have enough cash sitting in the bank to feel comfortable making the purchase. It's a form of status quo bias.
Both approaches come with a cost.
Consider the words of Solomon:
It is not good to defer hope indefinitely. Yet it's equally unwise to satisfy every desire the moment it appears.
The bridge between those extremes is diligence.
Saving for a Big Purchase Starts with a Plan
I encourage most significant purchases to fall into a one- to three-year planning horizons. Examples include:
- A down payment on a home
- A vehicle
- A boat
- A major vacation
- New technology
- A home renovation
- A wedding or anniversary celebration
- Mission or charitable travel
- Starting a business
These purchases might cost a few thousand dollars or well into six figures.
Step 1: Create a Sinking Fund
The first step is opening a separate account dedicated solely to future purchases. Many people call this a sinking fund. I refer to it as a Preparation Fund because it represents intentional preparation for specific goals that are irregular, one-time and/or unpredictable.
Remember:
Your Emergency Fund protects you from job loss, medical or travel emergencies.
Your Retirement Account builds long-term wealth.
Your Preparation Fund exists for expected expenses that simply haven't happened yet.
Step 2: Calculate Your Monthly Savings
Then subtract any expected proceeds from selling or trading an existing asset.
Finally, divide the remaining amount by the number of months until your goal—ideally no more than 36 months*.
Now you know exactly how much needs to move into your Preparation Fund each month.
*Three years is long enough to accumulate meaningful savings without allowing goals to drift into the indefinite future. Beyond three years, many goals change. Families grow. Priorities shift. A shorter horizon creates urgency while remaining realistic.
Step 3: Adjust Your Budget Around Your Values
Rather than asking, "Can I afford this?"
Ask:
Using a value-based budget helps ensure your money reflects what matters most instead of disappearing into countless small expenses.
Step 4: Track Spending Until the Habit Forms
If reaching your monthly savings target requires changing your spending habits, consider using a budgeting app for the first two or three months. This develops the habit so it becomes second nature to you.
Step 5: Decide How Your Savings Should Behave
This is where many investors ask an important question:
Should I save or invest? Should I invest my savings?
The answer depends almost entirely on your timeline, flexibility, and tolerance for risk (the unexpected).
Should I Invest Money I'll Need Soon?
A common question investors ask is:
Should I invest my savings if I plan to use the money within a few years?
Long-term investing works because time allows compounding to overcome short-term market volatility. But over one to three years, compounding has very little opportunity to work while downside risk remains very real.
A market decline at exactly the wrong moment could postpone your purchase indefinitely.
That's why saving for short term goals generally looks very different from investing for retirement.
For most goals with a firm deadline within three years, cash equivalents are usually the better choice.
Possible options include:
Conservative (Fixed Timeline / No Tolerance for Surprises)
- Money market funds or accounts
- Laddered CDs
- Individual investment-grade government or corporate bonds matched to your timeline
Moderately (Flexible Timeline / Some Tolerance for Surprises)
Advanced Investors (Highly Flexible Timeline / High Tolerance for Surprises)
- Broad-market ETFs combined with option collars
- Broad-market ETFs hedged with protective put options
An Example: How to Save for a Car
Suppose you're planning for how to save for a car.
You expect your next vehicle to cost $40,000.
Maybe your current vehicle should sell or trade for approximately $5,000, meaning you'll need to save $35,000 yourself.
- Goal: $35,000
- Interest earned: 3.5% in a money market account
- Savings period: 36 months
Now compare that with assuming an 8% investment return.
Despite taking significantly more investment risk, you've only reduced your monthly savings by about $60.
That's because three years simply isn't long enough for investment returns to meaningfully change the equation.
The additional risk usually isn't worth the relatively small potential reward.
Saving $920 each month may initially sound difficult.
In other words, financing often feels easier today because the monthly payment is lower.
Yet it costs considerably more over time.
The same mindset works for nearly every recurring major purchase.
When you do this consistently, your car payment doesn't disappear—but you’ve flipped the script. Interest works in your favor instead of against you.
How to Save for a House or Other Major Goals
The same principle applies whether you're researching how to save for a house, funding a home renovation, planning a wedding, or preparing to launch a business.
When the timeline is short and the date matters, certainty becomes more valuable than chasing higher returns.
As your investment horizon stretches beyond 10 or 15 years, the math changes dramatically. Over those longer periods, the historical benefits of investing have consistently outweighed the short-term volatility.
But intermediate-term goals require a different approach.
Build a Financial Life That Creates Opportunity
Ultimately, saving for a big purchase is about creating options.
A dedicated Preparation Fund helps you avoid the two most common mistakes:
- Buying before you're financially ready.
- Delaying meaningful goals indefinitely because you never made a plan.
It takes Discipline. Vision. Patience.
As Solomon observed:
And this tight-knit organization of your personal finances provides an emotional and financial foundation from which you can launch to new heights. When you're not buried in debt, when you're not simply treading water, and when you have surplus in each month's budget — you preserve energy and gain strength from the mindset that prospers and provides value.
You provide value not simply to yourself and your own family, but even to the world at large.