Condensed versions focusing purely on the core Narayan Bali rites might take around 4-5 hours, often completed in a single day. (Sources mention this timeframe).
More elaborate packages, sometimes including Tripindi Shradh, extensive Daan (charity), or multiple priests, might extend over 3 days or potentially longer. (Source mentions 3-day Narayanbali packages).
It’s essential to confirm the expected duration and included components with the pandit or service provider.