Bootstrapping a side project into a profitable seven-figure business
68 comments
·July 7, 2025bruce511
scubakid
Thanks. For a while there, it wasn't clear to me which side of the line I was walking.
Something that stuck with me from Poor Charlie’s Almanack is that low expectations are a cornerstone of a happy life. I built this for myself first, so when people actually signed up and paid, it was incredibly motivating. I was thrilled to spend my free time treating those early customers like royalty and building more of what they wanted.
If I had instead come into this with the expectation of quick success, I doubt I would have made it through those early years.
And cheers from one bootstrapper to another. It's not easy, but I can't imagine a more rewarding way to build.
katzgrau
+1 from someone who also bootstrapped a side project into a 7 figure business, and just happens to be absorbing some lessons from Poor Charlie’s Almanac on Audible recently.
scubakid
ha I listened on Audible too. great audiobook for a walk after dinner. Charlie's advice really holds up. which part have you gotten the most out of so far?
also, congrats!
chatmasta
Another lesson here: you built for a specific community who is passionate, money-motivated, and concentrates in specific social spaces (forums, reddit, etc.) where you can promote your business. This isn't always a recipe for success, but it's a damn good starting point. You need to adjust to the sensitivities of the community to avoid overly self-promotional content, but you always have a clear channel to promote your very specific product that meets their needs.
Crisco
Congrats! I’ve been a customer and have used it monthly since April 2021 when I first saw it here. It has been essential in planning out major life financial decisions as I’ve changed jobs, gotten married, and now as we consider children and purchasing a home.
I’ve appreciated the addition of new features over time and have recommended the tool to many friends and relatives. Hope to see another post in a couple years when you’ve hit $10M/yr!
scubakid
I'm grateful to hear it's made such a difference for you, and that early support back in 2021 means more than you know. In the down months and challenging times, it's the encouragement from early adopters like you that kept me going.
rorylaitila
It's an impressive accomplishment. I've always struggled to get through the valley of despair in a new project. I've decided that I can only build and sell things that I regularly use. Otherwise the signal is just too weak, and I eventually get burned out. But if I'm always a user of one, then at least it's validated for me.
scubakid
Caring is kind of a superpower. And not just in terms of signal, but also the quality of work. I don't think this would have gone anywhere if I hadn't cared deeply about solving the problem in an elegant way.
Earlier in my career, I worked on some things as a corporate engineer that were hard to care about, and there's just no comparison.
fuzzfactor
>The willingness to doggedly show up every single day can take you to some really suprising and amazing places.
>Caring is kind of a superpower.
>the quality of work.
>I was thrilled to spend my free time treating those early customers like royalty
Well, the secret's out, thanks for that, now anybody can do it ;)
CalRobert
I saw this, thought "wow this is great, I sure miss living in the US where good tools like this are available, everything in Europe is crap" but lo and behold, there's the Netherlands tax preset. Fantastic.
scubakid
I think there may be a few wrinkles in the nl tax code that are tricky to capture with the current framework, but it has been a goal from the beginning to be as inclusive as possible for international scenario modeling. I'm continually making refinements there, and always open to ideas and suggestions if you have some.
feizhuzheng
it is like some bias where everyone is talking about it but no one actually did it except for very few people
yesimahuman
Congrats! I'm a customer. Haven't used it too much but so far I like having it to check in periodically. One wish list item: live securities prices to avoid having to copy/paste values all the time. For example, with that you can have a live snapshot of the values in most brokerages
adventured
Live is overkill, all they'd need is an every 30-60 minute update on equity prices, which is not an overly expensive thing to acquire. With a 65% profit margin in their business, this is a dead-obvious feature they should be automating away to save their users a sizable headache.
scubakid
Account linking for automated balance updates is our most upvoted and most controversial feature request.
I agree it would be really nice if it worked well, but my understanding from other founders is that aggregator reliability still leaves a lot to be desired in 2025, and is always a huge expense and support burden. As a small, bootstrapped team building a long-term planning tool where current balances are only a small piece of the picture, we need to be really careful about what we choose to take on. Currently there are still dozens of other high-priority feature requests that will also deliver real value but without those downsides.
I do go back-and-forth on this though. And I think eventually there will come a time for it.
Glad to hear you're enjoying the tool, and thanks so much for your support!
p.s. also might be worth noting that there is a plugin system, and community members have built integrations that can pull in balance updates automatically from some of the popular budgeting tools.
pixelmonkey
To provide a data point from a long-time ProjectionLab user, I don't really need account linking. I use Monarch Money to link cash and CC accounts to track spending.
I use a custom Google Sheet to track retirement portfolio performance. If =GOOGLEFINANCE isn't enough, there is a nice paid extension called WiseSheets, which adds a =WISE function that fills all the gaps.
My monthly ProjectionLab process is to update the "Current Finances" values on the first of the month, using the values from the other tools. Works well enough for me!
dvrp
Congratulations man, it makes me so happy to read this and I can relate to that dopamine rollercoaster phenomenon you are talking about.
scubakid
aww thanks, glad to hear it resonates.
it seems like every founder has their own version of that rollercoaster.
which moments from yours do you feel you learned the most from?
mNovak
I remember seeing this on HN years ago. Congrats on the growth! I think this is still an underserved field (shockingly, considering how many people it impacts).
I really wish just saving a basic plan to refer back to didn't cost $100/yr. The one-off 'Basic' plans never made sense to me, considering it takes hours to set up a relatively complete model -- might not even have time to do it all in one sitting.
jonkuipers
Thanks! Supporting Basic users comes at a real cost, but we want planning to stay accessible for everyone. To us, one-off planning feels like a better alternative than stripping down the product or selling user data.
ilamont
During the first few years, I was approached by dozens of potential “partners.” Several wanted an outsize equity stake to essentially just make suggestions.
A warning to others starting new ventures: once you get a whiff of traction, and sometimes even before then, the parasites will ooze out of various nooks and crannies, attempting to latch onto a fresh new host.
HN loves to pound on MBAs weaseling their way into startups, but opportunists may come from unexpected quarters.
I experienced a classmate sidling up to offer "translation services" for 2% of outstanding shares. Then there was a startup that proposed a "merger" which would basically allow them to walk away from failure in exchange for equity.
mdorazio
Congratulations! But I’m disappointed with no mention of profit level in this post or another one linked. My last business I scaled to 500K ARR in less than two years, with $20K in total annual profit including the $0 my cofounder and I paid ourselves for many hours of work. I shut it down a year later and strongly regret the amount of work I put into it.
There’s an ARR metric trap in the founder community where people focus on revenue rather than on reaching a level of take-home income comparable to what they could make at a normal job. The former is a lot easier than the latter (especially in the US for people who can take home $250K fairly easily working in tech) - as the saying goes, you can make infinite revenue by selling dollars for 99 cents.
scubakid
Profit margin started out around 90% in the early years, but is looking more like 65% this year now that we're making a concerted effort to reinvest into growth, building a team, etc.
FredPret
If ARR grows enough, there should be plenty of room in there to pay the founders.
For extreme examples of ARR growth at 0% profit paying off, look at Uber, Amazon, and ServiceNow. I know these are very much outliers. All three had rapid revenue growth but profits at (or far below) zero. But for all three, the founders are sitting pretty today.
chrisweekly
I don't think I'd call earning $250k "easy". Yes a significant % of us on HN are there, but we're still in the minority.
hermitcrab
I share your frustration with the endless focus on revenue, rather than profit (looking at you, indiehackers.com). I suspect in many cases it is because they are embarassed to disclose their profit.
But congrats to the OP. It is impressive growth for a bootstrapped business.
nico
Great success story. Congratulations
Also, thank you for sharing the ups and downs. Seeing the details of the monthly bars chart was super enlightening. I usually only see the nice looking overall positive growth chart without any nuance, so I really appreciate the transparency
Hope you keep going and growing
scubakid
Thanks! Seeing indie hackers building in public transparently about the ups and downs like pieter levels, danny postma, jon yongfook, etc, really inspired me early on. So I decided to try to emulate that. (Well, partly: idk how some of those guys post 100x a day)
ipaddr
The validation piece I don't understand. From first sale to first dip to each peak and fall when was the validation reached? First sale, 1k revenue?
You can find 5 users who will pay but that doesn't validate a million a month.
What does product validation mean here.
scubakid
I think it can vary from person to person depending on your goals. For me, an important signal was that complete strangers were willing to pay. That first Show HN post made all the difference. Without that, this could have ended up in my side project graveyard with 100 other projects.
vladmk
Curious to how many projects you launched you personally resonated with before this one
pan69
Maybe validation isn't one big moment, but maybe validation could be many small moments. So, those first 5 users: small validation. First 1K MRR: small validation. Etc. I think the point of the article is to be persistent and if you're getting small validations along the way, then those are indicators to keep going. At least, that's my take.
xyzzy9563
I only have a product that makes $6k per month, but from my point of view, the validation is how many paying users sign up per day. Even one per day can add up. Hope this helps.
wayoverthecloud
Could you share what worked for you? Is it B2B/b2c? I guess that matters too for the type of marketing to focus on?
growbell_social
If you can make 6k per month. You can probably get to 60k per month.
It's so, so , so hard to walk the line between persistence (which leads to glory) and stubbornness (which leads to more time following already wasted time.)
Congratulations for walking this line correctly.
I agree that some sort of market validation is necessary to at least pretend you are on the former not the latter. Those early usage spikes are helpful reminders that there is a business here somewhere.
I'll also make a note that you spent time on marketing from the early days. Writing blog posts, promoting said posts, having a Discord server, committing to answer emails, all of this is marketing and its likely lead to success more than the code.
I notice whenever there was a dip in revenue, marketing (in the form of more blog posts) was the response. I suspect that was intentional, and definitely a better approach than "let me go away and silently code more features."
So there are valuable lessons to others here. Congratulations not just on the current success but also on sharing the path that leads to success. Ultimately you can show the way, but you can't make people learn from it.
Oh, and I like the bootstrapping approach. I did the same, and I'm not sorry. It's longer and harder but also skips an enormous amount of extra work.