What are the hidden costs of sticking with the wrong accountant?

Late GST Return: Penalties and interest — hundreds in fines. Late ACRA Annual Return: S$300 (under 3 months) / S$600 (over 3 months). Missed ECI Filing: Estimated assessment (usually higher) + potential penalties. Founder Time Wasted: Hours spent chasing updates — worth S$16,000-36,000 per year. Director Liability (Section 199): S$10,000 fine + 12 months imprisonment.