A millennial tried out the TikTok-famous cash stuffing budget method — and said it helped her pay off a $19,000 car loan ahead of schedule

• Cash stuffing, an old-school budgeting trick, is gaining popularity among young people on TikTok.
• Cash stuffing involves putting cash in labeled envelopes to help people track their spending.
• Berenice Rodriguez, 29, said cash stuffing helped her pay off debt while saving for a house.

Berenice Rodriguez, a 29-year-old dental assistant in North Carolina, said she used to have a bad relationship with money and spent way too much on eating out and things she didn't need.

"The most confusing part of this journey was figuring out where my money went," Rodriguez told Insider. "I paid my bills, but everything else felt like it went down the drain."