The 100 envelope challenge is a simple savings method that helps you save $5,050 using 100 envelopes numbered from 1 to 100. Each envelope represents a dollar amount: envelope #1 gets $1, envelope #25 gets $25, and envelope #100 gets $100. Once you’ve filled all 100 envelopes with their matching amounts, you’ll have saved exactly $5,050.
The traditional version involves filling one envelope each day for 100 days. You can choose envelopes in numerical order or pick them randomly. If saving that much in just over three months isn’t practical, you can spread the challenge over several months or even a year. The total stays the same as long as you complete every amount from $1 through $100 once.
100 Envelope Challenge at a Glance
| Feature | Standard challenge |
|---|---|
| Number of envelopes | 100 |
| Envelope numbers | 1–100 |
| Smallest deposit | $1 |
| Largest single-envelope deposit | $100 |
| Total savings | $5,050 |
| Traditional duration | 100 days |
| Traditional frequency | One envelope per day |
| Average per envelope | $50.50 |
| Order | Sequential, random, or flexible |
| Alternative schedule | Weekly, biweekly, or flexible |
| Physical cash required | No, a digital version is possible |
The $5,050 total comes from adding every number from 1 through 100. Changing the order or schedule doesn’t change the total.
What Is the 100 Envelope Challenge?
The 100 envelope challenge is a money-saving activity where you fill 100 numbered envelopes with matching dollar amounts until you’ve set aside $5,050.
The concept is straightforward:
- Envelope #1 represents $1.
- Envelope #10 represents $10.
- Envelope #25 represents $25.
- Envelope #50 represents $50.
- Envelope #75 represents $75.
- Envelope #100 represents $100.
Instead of trying to put aside one large amount at once, you complete 100 smaller savings actions.
The challenge became widely known through social media, but it does not require a special app, bank account, or financial product. It is simply a structured way to organize your own savings.
It is also different from cash stuffing. Cash stuffing generally divides money into spending categories such as groceries, transportation, and entertainment. The 100 envelope challenge has one main purpose: completing a predetermined series of savings amounts.
How Does the 100 Envelope Challenge Work?
The basic rule is:
The envelope number tells you how many dollars to save.
For example:
- Pick envelope #7 → save $7.
- Pick envelope #23 → save $23.
- Pick envelope #46 → save $46.
- Pick envelope #89 → save $89.
Suppose you choose envelope #12, then #50, then #3.
You would save:
$12 + $50 + $3 = $65.
Your remaining target would be:
$5,050 − $65 = $4,985.
Once an envelope has been completed, do not use that number again. If you choose envelopes randomly, choose only from the numbers you have not yet completed.
Organizations such as Fidelity explain the standard 100 envelope challenge using the same basic idea: assign amounts from $1 through $100 and gradually complete them until the full total has been saved.
How to Do the 100 Envelope Savings Challenge Step by Step
Step 1. Get 100 Envelopes
For the traditional cash version, you need:
- 100 empty envelopes;
- a pen or marker;
- a box, folder, or organizer;
- a simple way to track which envelopes are complete.
You do not need to buy a special savings binder or kit. Ordinary envelopes work.
Step 2. Number the Envelopes From 1 to 100
Give every envelope a unique number:
1, 2, 3, 4 … 100.
The number represents the dollar amount that goes into the envelope.
For example:
- #1 = $1;
- #20 = $20;
- #55 = $55;
- #100 = $100.
Do not skip numbers or use the same number twice if you want to follow the classic version and reach exactly $5,050.
Step 3. Choose Your Savings Schedule
The traditional version uses:
One envelope per day for 100 days.
But 100 envelopes do not have to mean 100 consecutive days.
You could instead complete:
- one envelope per week;
- two envelopes per week;
- several envelopes on payday;
- envelopes whenever you have money available.
Changing the schedule changes how long the challenge takes, not the final total.
Step 4. Pick an Envelope and Save the Matching Amount
There are several ways to choose envelopes.
Numerical order
Start with #1 and work toward #100.
The beginning is easy:
- Day 1 — $1;
- Day 2 — $2;
- Day 3 — $3;
- Day 4 — $4;
- Day 5 — $5.
However, the amounts become much larger toward the end.
Random order
Mix the envelopes and choose one without looking.
For example:
- Day 1 — $42;
- Day 2 — $6;
- Day 3 — $87;
- Day 4 — $15.
This changes the order of the deposits but not the final total.
Flexible order
Choose any unfinished envelope based on the amount you want to set aside that day.
For instance, you might complete #5 one day and #60 another day.
All three methods reach $5,050 as long as every number is completed once.
Step 5. Track Your Progress
Keep a list from 1 to 100 and mark each number when you make the corresponding deposit.
You can use:
- a paper checklist;
- a spreadsheet;
- a digital checklist;
- a simple savings tracker.
Track both the number of envelopes completed and the actual money saved.
These are not always the same percentage of the goal.
For example, completing envelopes #1, #2, and #3 means you have finished three envelopes, but you have saved only $6.
Step 6. Complete All 100 Envelopes
The challenge is complete when:
- all 100 numbers have been used;
- every amount from $1 through $100 has been saved once;
- your total contributions equal $5,050.
How Much Do You Save in the 100 Envelope Challenge?
You save exactly $5,050 in contributions when you complete the standard challenge.
The calculation is:
$1 + $2 + $3 + … + $100 = $5,050
You can also calculate it using:
100 × 101 ÷ 2 = 5,050
Another easy way to see the math is to pair the smallest and largest amounts:
- $1 + $100 = $101;
- $2 + $99 = $101;
- $3 + $98 = $101;
- $4 + $97 = $101.
There are 50 such pairs.
So:
50 × $101 = $5,050.
The average contribution is $50.50 per envelope, but that does not mean you put $50.50 into each envelope. Individual contributions range from $1 to $100.
How Long Does the 100 Envelope Challenge Take?
The traditional challenge takes 100 days, but the timeline is flexible.
100 Envelope Challenge Savings Schedule
| Savings pace | Time to complete | Average contribution |
|---|---|---|
| 1 envelope per day | 100 days | $50.50 per day |
| 1 envelope per week | 100 weeks | $50.50 per week |
| 2 envelopes per week | 50 weeks | $101 per week |
| 4 envelopes per week | 25 weeks | $202 per week |
| 5 envelopes per week | 20 weeks | $252.50 per week |
These are average amounts. Actual contributions vary depending on which envelopes you choose.
There is one way to make the two-envelope-per-week version equal exactly $101 each week: pair opposite numbers.
For example:
- 1 + 100 = 101;
- 2 + 99 = 101;
- 3 + 98 = 101.
Continue this pattern for 50 weeks and each weekly contribution will equal $101.
Do You Have to Fill the Envelopes in Order?
No. You can complete the envelopes in any order.
Numerical Order
This is simple and predictable, but the amounts become progressively larger.
The first ten envelopes total:
$1 through $10 = $55.
The last ten total:
$91 through $100 = $955.
That difference can make the later part of the challenge much more demanding.
Random Order
Random selection mixes small and large deposits.
It can make the process feel more like a game, although several high-number envelopes can appear close together.
Flexible Order
A flexible approach lets you choose any remaining amount.
If you want to set aside $8 today, complete envelope #8. If another day allows for $72, complete #72.
The final total remains the same.
Can You Do the 100 Envelope Challenge Without Cash?
Yes. Physical envelopes are optional.
A digital version follows exactly the same logic.
For example, if you choose envelope #27:
- Transfer $27 into the money you are setting aside for the challenge.
- Mark #27 as complete.
If you later choose #84, transfer $84 and mark that number complete.
You can track the numbers in a spreadsheet or checklist instead of using paper envelopes.
SoFi’s explanation of the 100 envelope challenge also describes ways to adapt the method without relying on physical cash.
The important part is that each amount is actually set aside once. A planned transfer should not be marked complete until the money has been moved.
Can You Do a Smaller 100 Envelope Challenge?
Yes. The classic version totals $5,050, but the basic idea can be adjusted.
100 Envelope Challenge Variations
| Challenge version | How it works | Total saved |
|---|---|---|
| Classic 100 envelopes | Save $1 through $100 | $5,050 |
| Half-amount challenge | Save $0.50 through $50 in $0.50 steps | $2,525 |
| 50-envelope challenge | Save $1 through $50 | $1,275 |
| 25-envelope challenge | Save $1 through $25 | $325 |
| Double-amount challenge | Save $2 through $200 in $2 steps | $10,100 |
Half-Amount Challenge
Keep all 100 envelope numbers but save half the number.
For example:
- #1 = $0.50;
- #20 = $10;
- #100 = $50.
Total: $2,525.
50-Envelope Challenge
Use envelopes numbered 1 through 50.
Total:
$1 + $2 + … + $50 = $1,275.
25-Envelope Challenge
Use numbers 1 through 25.
Total: $325.
Double-Amount Challenge
Double every standard amount.
For example:
- #1 = $2;
- #50 = $100;
- #100 = $200.
Total: $10,100.
What Happens If You Miss a Day?
Nothing happens to the final amount.
If you skip a day, simply continue later with an unfinished envelope. You do not need to restart the challenge.
For example, if you complete 12 envelopes and then take a break, resume with any of the remaining 88 envelopes.
Missing days changes the timeline, not the $5,050 total.
If a particular envelope amount is not practical on a given day, you can also choose a smaller unfinished number and return to the larger one later.
What Are the Pros and Cons of the 100 Envelope Challenge?
Advantages
Simple rules: The process is easy to understand.
Clear target: You know the full total in advance.
Visible progress: Every completed envelope marks another step.
Flexible schedule: You can slow down or speed up the challenge.
Customizable amounts: Smaller versions are easy to calculate.
Limitations
The full challenge requires $5,050: Completing it in only 100 days means setting aside an average of $50.50 per day.
Deposits vary substantially: Some individual amounts are $80, $90, or $100.
Random selection can be unpredictable: Several large deposits may occur close together.
Physical cash needs secure storage: Keeping thousands of dollars in cash requires consideration of loss or theft risk.
The challenge does not generate additional income: It organizes money you are already setting aside.
How to Keep Your 100 Envelope Savings Organized
Keep a clear record of every completed number so you do not accidentally repeat or skip envelopes.
If you use physical envelopes, separate completed envelopes from empty ones and keep the cash in a secure location.
If you prefer the digital approach, maintain a checklist and record only deposits that have actually been made.
You can also change your schedule during the challenge. Moving from daily deposits to weekly deposits does not change the classic total as long as every amount from $1 through $100 is eventually completed.
The 100 envelope savings challenge is a straightforward way to set aside $5,050 through 100 individual deposits. Label your envelopes from 1 to 100, save the matching dollar amount for each one, and track your progress until every number is complete. You can follow the traditional 100-day schedule, spread your deposits over a longer period, or use a digital tracker instead of cash. As long as you save every amount from $1 through $100 once, your total contributions will add up to $5,050.