Full transcript
0:00At 1 in the morning, Chris is sitting on
0:02the edge of his bed Googling ketchup
0:04contributions. He's 41. He's done
0:06everything he was told to do. Across
0:09town, Megan is asleep. Tomorrow on her
0:12lunch break, she's going to sketch out
0:14what going part-time at 55 looks like.
0:17The math works. It isn't even close.
0:20Here's the strange part. They sit about
0:2210 ft apart at work. They were hired a
0:25week apart in 2012, sat through one
0:28orientation together, and both picked
0:30the target date fund at the top of the
0:32list because, honestly, who reads the
0:34rest? 6% of every paycheck, both of
0:38them. And her balance is almost double
0:40his.
0:41He didn't pick worse stocks. He didn't
0:43earn less. HR would have leaked that by
0:45lunch. He wasn't unlucky. Once, years
0:49ago, Chris made one decision that took
0:51about 4 minutes on a website. He thought
0:54he was being responsible. This isn't a
0:56video about how long compounding takes.
0:59It's about the clock you didn't know you
1:01keep resetting.
1:03My name is Nick, and I've built more
1:04compound interest spreadsheets than any
1:06well-adjusted person should. If you've
1:09ever opened your retirement account and
1:11wondered whether it's actually doing
1:13anything, hit subscribe. By the end of
1:15this, you'll know the exact year your
1:17money starts pulling its weight and the
1:19three resets that quietly push that year
1:22further away. I'm not a financial
1:24advisor, and this isn't financial
1:26advice. It's just math, and the math
1:29doesn't care about my opinion, either.
1:31Here's the thing about compounding
1:33advice. Ask anyone how long it takes to
1:36work, and you get the same two words,
1:38long term. Long term is not a number.
1:42Long term is what your landlord says
1:43about fixing the dishwasher. And the
1:46quote everybody uses to sell it,
1:48compound interest is the eighth wonder
1:50of the world. Albert Einstein.
1:53It's on posters, on LinkedIn, on the
1:55wall of a financial advisor's office in
1:58every strip mall in America. Einstein
2:01never said it. Princeton's own
2:03collection of his quotes files it under
2:06probably not by Einstein.
2:08The earliest close match anyone has
2:10found is a 1925 newspaper ad for a
2:13savings and loan in Cleveland. So, the
2:16most famous line about compounding
2:18wasn't written by the smartest man of
2:20the century. It was written by a bank
2:23copywriter in Ohio.
2:25Which honestly tracks, the real math is
2:28older and a lot more useful. In 1494, an
2:32Italian friar named Luca Pacioli, the
2:36man often called the father of
2:37accounting, wrote down a shortcut,
2:39divide 72 by your interest rate. And
2:43that's roughly how many years it takes
2:45your money to double, the rule of 72.
2:49It's 532
2:51years old and your bank's app still
2:53won't show it to you.
2:55Remember Pacioli, he's about to answer
2:58the title of this video. Twice, let's
3:00run the real numbers on a boring
3:02realistic setup. $500 a month into a
3:06plain stock index fund. We'll assume 7%
3:10a year after inflation, which is almost
3:13exactly what the S&P 500 has done since
3:161926 once you strip inflation out. No
3:20fees, no taxes, no genius moves.
3:23After year one, you've put in $6,000.
3:26Compounding has added, um,
3:29190. That's a nice dinner for two as
3:33long as neither of you orders a drink.
3:36Year three, the market adds about 1,100
3:39for the year. And this is the part
3:41nobody warns you about because it
3:43doesn't show up on a chart. It feels
3:45like opening the app on your lunch break
3:47and closing it faster than you opened
3:49it.
3:50It feels like doing quiet math on
3:52whether that money would have been
3:53better as a vacation. It feels like
3:55everyone else knows something you don't.
3:58Year five, about 2,100.
4:01Year seven, about 3,300.
4:04Year 10, 5,400.
4:06Still less than the six grand you put in
4:08yourself. For a full decade, you're the
4:11engine and your money is the passenger.
4:14Then, in year 11, it flips. That year,
4:17your investments earn $6,177,
4:23more than you contributed. For the first
4:26time, your money did more work than you
4:28did. I call that the paycheck line, the
4:32year your money out earns your own
4:34contributions. And it isn't random. 72 /
4:387 is about 10. The paycheck line lands
4:41right at your money's doubling time. At
4:4310%, it's around year eight. At 5%,
4:47about year 15. Pacioli, still
4:51undefeated. Now, quick test. Person A
4:54invests $200 a month. Person B invests
4:582,000. Same fund, same returns.
5:01Who crosses the paycheck line first?
5:04Lock in your answer. Neither, same year.
5:07Year 11. When you work through the
5:09equation, the contribution amount
5:12literally cancels out. If you're
5:14starting from zero, saving more makes
5:17the numbers bigger. It does not move the
5:19date. The only exception is a big lump
5:22sum you already have invested, which
5:24gets you there sooner. For everybody
5:26building from a paycheck, you cannot buy
5:29your way to the paycheck line. You can
5:31only get there. Chris was on his way
5:33there, too, by the way. Remember that.
5:36Because 10 clean years sounds comforting
5:39right up until you meet someone who did
5:41every single thing right and nine years
5:44in was down $10,000.
5:46Meet Linda.
5:48In January of 2000, Linda is 35 and
5:51finally gets serious.
5:53500 a month's worth into an S&P 500
5:57index fund, which to keep the math
5:59simple, we'll drop in as $6,000 every
6:02January. These are the market's actual
6:05yearly returns. Quick note, Linda's
6:08numbers aren't adjusted for inflation,
6:10the spreadsheet ones were, so hers will
6:13look bigger.
6:14If you remember the year 2000, you
6:16already know how this starts. The
6:18dot-com bubble pops. The market falls 3
6:21years in a row.
6:23By the end of 2002, Linda has put in
6:26$18,000 and has about 12 and 1/2. She
6:29keeps going. By 2007, she's finally up
6:33about 16 grand.
6:35Then, 2008. Lehman Brothers collapses in
6:39September.
6:40Every news channel has the same red
6:42arrow in the corner of the screen.
6:44Linda's coworkers stop asking her about
6:47her index fund, which honestly is its
6:49own kind of mercy. The market drops 37%
6:53for the year. By December, Linda has put
6:56in $54,000
6:58and her account says about 44. 9 years.
7:02Never missed a month, never chased
7:04anything, never touched it. Down 10
7:07grand. At that point, your index fund
7:09isn't an investment, it's a hostage
7:11situation.
7:13Here's what almost everyone did next.
7:15They sold. So, let's give Linda a twin.
7:18Twin Linda sells everything at the end
7:20of 2008, keeps saving the same 6,000 a
7:24year in cash, and buys back in January
7:272011 when it finally feels safe. Very
7:30sensible, very normal. Real Linda just
7:33keeps going.
7:35500 a month straight through. Not
7:38because she's braver than you. Mostly
7:40because she set it up to happen
7:42automatically and like genuinely forgot
7:44her password for a while. In March of
7:472009, the market bottoms out and then
7:50rips higher almost immediately. Twin
7:53Linda is sitting in cash watching it
7:56happen waiting for things to feel calm.
7:58Things do not feel calm until the market
8:01is already way up. By 2013, real Linda's
8:05account grows about $37,000
8:08in a single year. That's more than 6
8:10years of her own contributions in 12
8:13months. By 2019, 85,000 in a year. In
8:192022, the market drops 18% and her
8:22account loses 100,000 on paper. And
8:26she's still up more than 325,000
8:29overall. By the end of 2025, Linda has
8:33put in 156,000.
8:36Her account is worth almost 900,000.
8:39In 2024 alone, it grew by about 150,000.
8:44That's 25 years of Linda's contributions
8:47in 1 year. Twin Linda put in the exact
8:50same 156,000.
8:53Twin Linda has about 720,000.
8:562 years on the sidelines cost her
8:58roughly 170,000.
9:01And she's the lucky version. She
9:03actually came back. So, was 10 years a
9:06lie? No. 10 years is when compounding
9:09usually starts working. It just doesn't
9:11promise it'll feel like it.
9:13And later, I'll show you the 4-minute
9:16decision Chris made.
9:18And why it cost him about 10 times what
9:20it looked like. But first, history has a
9:23second line. Going back to 1928, the
9:27odds that the stock market made you
9:29money over a single month were about
9:3159%.
9:33Basically a coin flip with better
9:35marketing. Over 1 year, 69%
9:395 years, 79
9:4110 years, 88 20 years, 100%.
9:46Every single 20-year window. Now, go
9:49back to our spreadsheet. At 500 a month
9:51and 7% year 19 is when the total growth
9:55in your account becomes bigger than
9:57every dollar you ever put in. From then
9:59on, most of your money is money you
10:02never earned with a paycheck. That's the
10:05takeover line. And this is where it
10:07stops being a chart and starts being
10:09your life. Around year 20, the account
10:12is growing about $16,000 a year on its
10:15own. That's a used car every year that
10:19you didn't work for. By year 30, about
10:2238,000 a year. For a lot of people,
10:24that's a salary.
10:26A second version of you clocking in
10:28every year that never asks for a raise.
10:32The math says 19. History says 20. Two
10:36completely different methods landing on
10:38almost the same year.
10:41That almost never happens in finance.
10:43And remember I said Pacioli would answer
10:46the title twice. Run his rule two times
10:49in a row.
10:5072 / 7 is about 10 years for one
10:54doubling. So, two doublings is about 20.
10:58A friar in 1494 basically called the
11:00takeover line. Let me be crystal clear
11:03about one thing though. 20 years is
11:06where history says you stop losing. It's
11:08not a promise of getting rich.
11:11If you'd invested at the very top in
11:131929, even with dividends reinvested,
11:16you didn't see a new high until 1945.
11:2015 years underwater. The market always
11:23came back. It just didn't check your
11:25schedule first.
11:26And here's what nobody puts on the
11:28chart.
11:29Those years have to be in a row. Warren
11:32Buffett is the most famous investor
11:34alive, and most people think his secret
11:37is stock picking.
11:39Morgan Housel ran the numbers in The
11:41Psychology of Money back in 2020. At
11:44that point, Buffett was worth 84 and a
11:47half billion dollars. 84.2 billion of it
11:51came after his 50th birthday.
11:53Housel then imagined a normal Buffett.
11:56Spent his 20s figuring things out, had
11:59$25,000
12:00by 30, earned the exact same legendary
12:0422% a year,
12:06and retired at 60 to play golf. That
12:09Buffett ends up with about $12 million.
12:12Nice, and 99.9%
12:15less than the real one. Same skill, same
12:18returns. The only thing missing was the
12:20end of the clock. That's the part people
12:22get backwards.
12:24In our 40-year spreadsheet, the first 10
12:27years built less than 7% of the final
12:29balance. The last 10 built 53%.
12:34In year 40, the account grows about
12:36$80,000 in a single year. The early
12:39years don't make the money, they buy you
12:41a ticket to the years that do. So, when
12:44you reset the clock, you're not losing
12:46the beginning, you're deleting the
12:47ending. And there are three ways people
12:49do it. Reset number one, taking it out.
12:53Back to Chris.
12:54In 2016, he left for a startup. It
12:57fizzled, and he came back about a year
12:59later. When he left, he logged into his
13:02401 to cover rent in between.
13:05There was a button. There was a
13:06confirmation screen with a lot of small
13:09print about taxes and penalties that
13:11nobody in history has ever read. He
13:14clicked it. About 4 minutes start to
13:17finish, and a check showed up a few days
13:19later. Completely reasonable.
13:22Rent is rent. When he came back, he
13:24started over from zero. On paper, he's
13:27only a few years behind Megan. On paper,
13:30Megan crossed her paycheck line around
13:322023. Chris won't cross his until around
13:362028. Same company, same fund, same
13:40paycheck, and a 5-year gap in the one
13:43moment that actually matters. That's how
13:45you end up at 1:00 in the morning
13:47googling catch-up contributions.
13:49Here's what that move costs with our
13:51same 500 a month.
13:53Cash out in year six, which is about
13:55$44,000,
13:57then start over. By the end of a 40-year
14:00career, that decision costs roughly
14:03$442,000.
14:06It's the most expensive $44,000
14:09you will ever spend. More than a boat.
14:12More than a wedding.
14:14It is honestly in the running for the
14:16most expensive used Tacoma in human
14:18history. And it's getting more common.
14:21Vanguard says 6% of 401 participants
14:24took a hardship withdrawal last year,
14:27the highest share on record. The median
14:30was $1,900.
14:32$1,900 pulled out at 30 would have been
14:35about 20,000 by 65.
14:39And that's before the taxes and penalty
14:41on the withdrawal. No 401, freelancer,
14:44gig worker, self-employed, same clock,
14:47it just lives in an IRA, and it resets
14:50exactly the same way. Reset number two,
14:53stopping. You don't even have to take
14:55money out. Just stop contributing for 3
14:58years around year nine. Leave everything
15:00else invested. You put in $18,000 less,
15:04and you finish about $142,000
15:08behind. I did a version of this myself.
15:11In 2020, I paused my contributions for a
15:14few months to see how things shook out.
15:16Things shook out up almost 70% from the
15:19bottom by the end of the year. Great
15:21call, Nick. Reset number three, jumping
15:24around. That's twin Linda, and she has a
15:27lot of company. Morningstar compared
15:30what funds earned over the 10 years
15:32ending in 2025 with what the people in
15:35those funds actually earned. The funds
15:38returned 9.9% a year. The average dollar
15:41in them earned 8.7.
15:43That 1.2 gap is timing.
15:46Buying after things go up, selling after
15:49they go down. Over our 40-year
15:51spreadsheet, it's about $330,000.
15:55The boring money behaved. People in
15:58plain US stock funds captured almost
16:00everything. The least boring money did
16:02not. From early 2024 through the middle
16:05of this year, crypto ETFs returned about
16:088 and 1/2% a year. The average dollar in
16:11them lost almost six. The asset went up.
16:15The people went down. That takes real
16:17talent. Why is jumping around so brutal,
16:20JP? Morgan found that $10,000 in the S&P
16:24500 from 2005 through 2024 became about
16:2871,000 if you stayed put. Miss just the
16:3210 best days out of roughly 5,000, and
16:35you end with under 33.
16:38And seven of those 10 best days came
16:40within 2 weeks of the 10 worst. You
16:43can't skip one without skipping the
16:45other. Twin Linda found that out in
16:472009.
16:49And right now, the temptation is louder
16:51than usual. The S&P 500 has hit record
16:54highs more than two dozen times this
16:57year. That's exactly when compounding
17:00finally feels real, and exactly when the
17:03layoff, the wedding, the down payment,
17:06or the car that dies in the Costco
17:08parking lot starts whispering that it's
17:10a good time to take a little off the
17:13table.
17:14That whisper is the reset button with
17:16better lighting. Quick bonus, pay 1% a
17:20year in fees and you lose about $280,000
17:25over that same career, reset or no
17:27reset. And if you want proof compounding
17:30isn't lazy by nature,
17:33credit cards carrying a balance average
17:35about 21 and 1/2%, which doubles your
17:38balance in roughly 3 and 1/2 years.
17:41Compounding works exactly on schedule
17:44just for the bank.
17:46Which brings us to the question anybody
17:48over 30 is quietly asking right now.
17:51Here's the honest version.
17:53500 a month at 7% until 65, start at 25
17:58and you end with about 1.24 million.
18:01Start at 35, about 585,000.
18:06Start at 45, about 250,000.
18:10And the classic still holds. Someone who
18:12invests 500 a month from 25 to 35, just
18:16$60,000 total,
18:19then never adds a cent, ends up with
18:21about 650,000.
18:24Someone who starts at 35 and invests for
18:2630 straight years, $180,000
18:30total, ends up with less. Three times
18:32the money in, less money out. If that
18:35makes your stomach drop a little, you
18:37know, stay with me because the tables
18:40never say this part out loud.
18:42The paycheck line depends on the rate
18:45and the years, not your age. It's about
18:4710 years from whenever you start. Start
18:50at 45 and your money is outworking you
18:53by 55, you won't have the 25-year-old's
18:56ending. But you get the exact same
18:58crossover on the exact same 10-year
19:01clock and every year you don't reset is
19:04a year that clock keeps counting for
19:06you.
19:06And remember Linda? Linda wasn't 25.
19:10Linda was 35 starting at literally the
19:13worst moment of the century.
19:15She's in her 60s now, sitting on almost
19:18$900,000.
19:20She didn't need the perfect start. She
19:22needed an uninterrupted one.
19:24So, let me give you permission to do
19:26something radical. Stop measuring
19:28yourself against a 25-year-old who
19:31doesn't exist.
19:32The only race you're actually in is
19:34against your own reset button. And more
19:37people are winning it than you'd think.
19:39In Vanguard's data, only about 5% of 401
19:43savers traded during market swings. Most
19:47people sitting in plain target-date
19:48funds just left it alone, and balances
19:52just hit records. So, the shortest time
19:54you need to let compounding work.
19:57About 10 years to cross the paycheck
19:59line when your money starts working
20:01alongside you, about 20 to cross the
20:04takeover line when it's doing most of
20:06the work instead of you.
20:08Those aren't magic numbers. They're just
20:10what happens when math gets enough
20:12uninterrupted time to show off. But
20:14those are years in a row, not 10 years
20:17since you opened the account. 10 years
20:20since the last time you cashed out,
20:22paused, panicked, or paid somebody 1% to
20:25rearrange your furniture.
20:27Pacioli figured out the doubling math in
20:301494.
20:32A Franciscan friar with no internet, no
20:35app, and no retirement plan would still
20:37have told Chris not to click that
20:39button.
20:40Megan and Chris are still sitting 10 ft
20:42apart. Same fund, same paycheck. One of
20:46them just never touched the button. So,
20:49tonight, do one thing. Find the date of
20:52your last reset, the last cash out, the
20:55last pause, the last time you sold
20:57because it felt scary. That's your real
20:59start date. Don't count the years since
21:02you started investing, count the years
21:04since you last hit reset.
21:06And then, whatever it takes, keep that
21:09number going up.