* Q3 net profit drops to 1.811 bln reais

* Assets rise 14.9 pct from yr earlier to 485.69 bln reais

* Loan portfolio grows 10.2 pct on corporate credit (Recasts, adds analysts estimates, assets)

SAO PAULO, Nov 4 (Reuters) - Bradesco (BBDC4.SA: Quote, Profile, Research)(BBD.N: Quote, Profile, Research), Brazil's second-largest private-sector bank, posted on Wednesday a larger-than-expected decline in third-quarter profits as provisions for bad debt grew.

Net income fell to 1.811 billion reais ($1.04 billion) from 1.91 billion reais a year earlier, the bank said in a securities filing. Bradesco was expected to post a profit of 1.869 billion reais, according to the average estimate of eight analysts in a Reuters survey.

Bradesco's nine-month profit rose slightly to 5.831 billion reais from 5.819 billion reais in the same period a year earlier.

The bank said its credit portfolio rose 10.2 percent from a year earlier to 215.54 billion reais at the end of September.

Bradesco finished the quarter with 485.69 billion reais in total assets, up from 482.48 billion reais in the second quarter and compared with 422.66 billion reais a year earlier. ($1=1.746 reais) (Reporting by Elzio Barreto)