What PGBL is and when it works
PGBL (Plano Gerador de Benefício Livre) is a Brazilian private-pension product with a specific tax regime: up to 12% of your annual taxable gross income contributed is deductible from IR, producing a refund. The trade-off is that on withdrawal, IR is paid on the full balance — contributions plus growth. So PGBL only pays off for filers using the Complete method who stay within the 12% cap and invest long enough for the regressive table to reach 10%.
What VGBL is and when it wins
VGBL (Vida Gerador de Benefício Livre) has no deduction and no cap. In exchange, withdrawal IR applies only to the growth portion, not to the contributed capital. It is the natural choice for Simplified filers, for contributions above the 12% cap, and for short withdrawal horizons.
Regressive versus progressive table
The regressive (definitive) table starts at 35% (under-2-year withdrawals) and falls 5 points every 2 years until stabilizing at 10% after 10 years — applied per contribution (FIFO), not on the balance. The progressive table uses normal monthly IR brackets (0% to 27.5%) and can be offset on the annual return. For long-horizon retirement money, the regressive table almost always wins.
Reinvesting the refund: the detail that changes everything
PGBL's mathematical edge exists mostly because the annual refund can be reinvested and compounded for decades. If you spend the refund each year, the effect vanishes and PGBL underperforms VGBL in most scenarios. The calculator turns reinvestment on by default — it's the only honest comparison.
Combining PGBL and VGBL
You don't have to pick one. High earners who contribute above 12% of annual income should split: put exactly 12% into PGBL to capture the full deduction, and route everything above that into VGBL. That captures the tax benefit without falling into the double-taxation trap on the over-cap portion.