Calculate the liquidity screens—and then challenge them

Northstar pays $20,000 of Accounts Payable with Cash. Its working capital does not move. Its current ratio rises. Its Cash balance falls. Did liquidity improve?

The transaction gives three true observations and no automatic verdict.

What you will be able to do

You will compute the dollar difference and unitless ratio, explain why they can move differently, compare positions at different scale, and state what further evidence a liquidity conclusion needs.

Calculate from supported totals

Northstar begins with $120,000 current assets and $80,000 current liabilities:

Working capital = $120,000 − $80,000 = $40,000
Current ratio = $120,000 ÷ $80,000 = 1.50

Preserve the units. Working capital is $40,000; the ratio is 1.50, not $1.50. If current liabilities are zero, the ratio is undefined and should not be reported as infinity, even for an early-stage entity that happens to have no current obligations at the measurement date.

Trace numerator and denominator changes

Paying $20,000 Accounts Payable reduces both current assets and current liabilities:

Working capital = $100,000 − $60,000 = $40,000
Current ratio = $100,000 ÷ $60,000 ≈ 1.67

The unchanged difference hides a $20,000 Cash use and $20,000 claim settlement. The higher ratio follows from subtracting equal amounts when the starting ratio exceeds 1.00. Neither arithmetic fact decides whether remaining Cash and future inflows cover the remaining maturities.

Compare scale without declaring a winner

A smaller peer with $60,000 current assets and $20,000 current liabilities also has $40,000 working capital, but its current ratio is 3.00. The relative coverage is higher; the absolute current-resource base and claims are smaller. Asset quality, timing, operating cycle, and committed funding remain unknown. The peer's $15,000 Inventory could be obsolete or its $25,000 Receivables overdue; the ratio does not disclose either condition.

Reopen the totals

Ask what raised the numerator. Faster customer collections differ from overdue receivables; saleable inventory differs from obsolete stock. Ask what lowered the denominator. Normal settlement differs from delaying recognition or moving an obligation outside the current section without support.

Then connect the date-specific snapshot to operating cash flow and near-term maturities. Trends and peer comparisons need matched policies, periods, units, scope, and business models.

Exit check

Northstar's ratio rises from 1.50 to 1.67 after the payable payment. Write a three-sentence credit memo: one sentence on the arithmetic, one on the concrete Cash-and-obligation change, and one naming the minimum additional evidence needed before concluding whether short-term payment capacity improved.