Toby Fox Net Worth: Earnings From Undertale & Deltarune 2026

Toby Fox has never revealed his net worth. Online estimates swing from $2.5 million to $40 million — a gap that itself signals guesswork, not disclosure. What’s actually documented, through Forbes and Wikipedia, is his career and sales record. That holds up better than any dollar figure.

Quick Answer

Real name: Robert F. Fox
Known for: Writing, coding, and composing Undertale (2015) and Deltarune (ongoing)
Also known as: Radiation, FwugRadiation
Income sources: Game sales, soundtrack royalties, merchandise, outside composing work
Net worth: Not confirmed; public estimates vary widely
Recognition: Forbes 30 Under 30, Games category, 2018

Quick Facts

Category	Detail
Born	October 11, 1991, Manchester, New Hampshire
Real name	Robert F. Fox
Also known as	Radiation, FwugRadiation
Education	Northeastern University (BS)
Known for	Undertale, Deltarune
Occupation	Game developer, writer, composer
Recognition	Forbes 30 Under 30, Games, 2018
Net worth	Unconfirmed; estimates vary by source

How He Built His Wealth

Fox funded Undertale through Kickstarter in 2013, asking for $5,000. Reports on the exact amount raised vary — some cite around $51,000, others higher — so treat the precise number as unconfirmed. What’s certain: it far exceeded the goal.

The game launched in 2015. Forbes’ own profile on Fox states Undertale sold more than 2 million copies — the most solid sales figure available. Higher lifetime-sales claims exist elsewhere, but they aren’t confirmed the same way.

Fox wrote the story, coded the game, and composed the music largely himself. He owns the IP outright, so no publisher takes a cut of ongoing sales, streaming royalties, or merchandise — rare for a game this successful.

Where the Income Comes From

He’s composed for projects beyond his own games — tracks for the webcomic Homestuck, plus contributions to the Pokémon and Super Smash Bros. franchises, both confirmed by Wikipedia.

Deltarune adds more. It’s released in episodes since 2018, with each chapter bringing fresh sales and soundtrack activity.

Merchandise — plush toys, soundtrack albums, apparel — fills out the picture, though the size of that revenue isn’t public.

Why the Estimates Don’t Agree

Fox hasn’t broken down his finances publicly, and there’s no filing to check — he works independently, without a studio’s disclosure obligations. The numbers online, from $2.5 million to $40 million, trace back to unofficial net worth sites making their own calculations. Some of those same pages get basic facts wrong too — his real name, for one, is listed incorrectly on more than one competing page. Treat any specific net worth figure you see, including elsewhere online, as an estimate.

FAQs

What is Toby Fox’s net worth?
Unconfirmed. Estimates range from about $2.5 million to $40 million.

What is Toby Fox’s real name?
Robert F. Fox, per Wikipedia.

How did Toby Fox make his money?
Mainly Undertale and Deltarune sales, soundtrack royalties, merchandise, and outside composing work.

Did Kickstarter fund Undertale?
Yes, in 2013, well past its $5,000 goal. The exact total raised varies by source.

Has Forbes recognized Toby Fox?
Yes — 30 Under 30, Games category, 2018.

How many copies has Undertale sold?
Forbes states more than 2 million; some other estimates run higher but aren’t confirmed.

Does Toby Fox own the rights to Undertale?
Yes, which is why royalties go directly to him.

Is Toby Fox married?
No public information confirms this.

Key Takeaways

No confirmed net worth figure exists — treat online numbers as guesses.
Forbes confirms his 2018 30 Under 30 recognition and 2 million+ copies sold.
His real financial story is ownership: he built Undertale largely alone and kept the rights.

Conclusion

Toby Fox’s wealth is real, but no specific figure is confirmed. What Forbes and Wikipedia back up is the career behind it — a Kickstarter-funded game built mostly solo, Forbes recognition in 2018, and IP ownership that keeps generating income.