Your household operates as a dual-engine system with fundamentally misaligned economics: while your personal savings rate sits at a healthy 29.7% (£2,676 monthly surplus), the joint account is hemorrhaging at -79.4%, burning through an average £1,471 monthly shortfall. The liquid position of £179,279 provides adequate buffer, though the gap between your £8,999 monthly income and joint outgoings of £3,325 suggests structural imbalance rather than temporary variance. Your investment portfolio at £131,089 meaningfully exceeds the remaining mortgage of £170,323, signalling net equity growth, but this strength is offset by the joint spending pattern which will erode that position if unaddressed, Sir. The commission volatility (ranging from an average of £18,581 to a peak of £38,145) adds planning complexity; you're budgeting to the floor, not the ceiling, which masks the true discretionary capacity. Systems nominal: liquidity secure, but joint account sustainability requires urgent review.