Your job is not to issue invoices. Your job is to collect cash. And if you're waiting until the end of the week to send them, or accepting 30-day net terms as the default, you're leaving weeks of working capital on the table. The math is brutal. If you invoice 10 clients for $5,000 each on the 1st of the month and collect on the 30th, you're sitting on $50,000 of your own money for a month. If you invoice on delivery day and offer a 2% discount for 7-day payment, you collect on day 8. The difference: 22 days of cash, every single month. Over a year, that's 264 days of working capital you freed up. For a small business that means the difference between making payroll and taking a line of credit. This isn't theoretical. We'll walk through three concrete tactics—with the exact numbers and the tools that make them scalable. Tactic 1: Invoice on delivery day, not end of week The simplest lever is also the most neglected. Most teams batch their invoicing: Thursday afternoon, someone generates 20 invoices for the week's work. By the time a client sees it, payment terms have already started their countdown. If you invoice same-day, you start the clock the moment work is done. The cash flow math: Monday delivery → Monday invoice → Friday payment (net 4 days) Wednesday delivery → Wednesday invoice → following Monday payment (net 5 days) Friday delivery → Friday invoice → following Wednesday payment (net 5 days) Compare that to batched Thursday invoicing, where Monday's work doesn't get invoiced for four days. You've lost a full week of payment velocity before the client even opens the email. For a services firm with 10 active projects at $3,000–$5,000 each, same-day invoicing cuts your receivables by 7 days. That's $21,500–$35,000 in working capital freed in the first month alone. How to implement it: Tie invoice generation to delivery. When you mark a project complete, auto-generate the invoice in your system. Use invoice software that integrates your CRM and project timeline —so invoicing is not a separate step, it's part of delivery closure. Set a default payment term (net 7, net 14) but make same-day sending non-negotiable. If you're using spreadsheets or email, you've already lost. A few lost days per client compounds into weeks of delayed cash. Tactic 2: Offer a 2% discount for 7-day payment—and measure who takes it A 2% early-payment discount sounds tiny. It's not. The math: A client receives a $10,000 invoice. You offer 2/7, Net 30 (2% discount if paid within 7 days, full amount due in 30). If they pay in 7 days: they pay $9,800 and you collect 23 days early. If they pay in 30 days: they pay $10,000 and you wait the full term. The client saves $200. From your side, you've moved $10,000 in cash from day 30 to day 7. That's worth more than the $200 discount if you'd otherwise have borrowed against receivables. The real win: Not all clients take the discount. And which ones do is data. If 60% of your clients take a 2% discount for 7-day payment, you've shifted your cash-in timeline by 2 weeks on average. If you're invoicing $50,000 a month, that's $100,000 in working capital unlocked over two months. The 20% who never take the discount? Those are candidates for: A higher discount tier (3% for 5 days) to test if cash constraints are the issue. A conversation about payment plan options (see Tactic 3). A shift to net-15 or net-10 terms instead of net-30, if the relationship allows. How to track it: Your invoicing tool should report on discount take-rate by client and cohort . If Enterprise clients take discounts 80% of the time but Startups take them 30%, you adjust your terms by segment. Real number: A $2M/year service firm tested 2/7, Net 30 across 40 clients. 68% took the discount. Average payment moved from day 28 to day 6. Working capital freed: $267,000 in the first month. Tactic 3: Let slow payers choose installments instead of going dark Some clients don't take early-payment discounts because they genuinely cannot pay in full on a 7 or 14-day cycle. They have cash flow constraints. And if you force a binary choice—pay now or get dunned—they go silent. A payment plan option keeps the relationship alive and gets you something instead of nothing. The psychology: A client gets a $12,000 invoice with Net 30. They panic. They don't have $12,000 on day 30, so they ignore the invoice. By day 60, you're chasing them. Instead: "You can pay this in three equal installments: $4,000 on day 10, $4,000 on day 20, $4,000 on day 30. Or pay in full by day 15 for a 2% discount." The client suddenly has agency. They can schedule their cash. And you get cash sooner than day 30 even if they don't take the full discount. The numbers: Client takes installment plan: You collect $4,000 on day 10 (12 days early), $4,000 on day 20 (10 days early), $4,000 on day 30 (on time). Average collection: 7.3 days early. Client still ignores it: You've lost nothing. But 70% of clients given an installment option will choose it if they're already