What is the average time it takes for businesses to pay invoices?
Average invoice payment times by industry — and what to do when yours is above benchmark
Short answer
The US B2B average days sales outstanding (DSO) sits around 40–45 days, meaning the average invoice is paid roughly 10–15 days after the stated due date. But the variation by industry is enormous: professional services and staffing average 30–40 days; construction and specialty trades average 60–90 days; government and public sector contracts regularly exceed 90 days; healthcare billing runs 45–65 days. Knowing your sector benchmark tells you whether slow payment is a you-problem you can fix or a market norm you need to price around.
DSO — days sales outstanding — is the standard metric for how long it takes to collect after an invoice is issued. The formula is (accounts receivable balance ÷ net revenue) × 365. A DSO of 45 means your average invoice takes 45 days to collect from the issue date. Industry benchmarks: professional services (consulting, law, accounting) 30–40 days; IT services and software 35–45 days; staffing and HR 30–45 days; advertising and marketing agencies 45–60 days; construction and general contracting 60–90 days; healthcare practices 45–65 days; manufacturing 45–55 days; government and public sector 60–120 days.
The gap between your payment terms and actual payment behavior is the number that matters. If your contract says net-30 but your actual DSO is 55, you are financing your customers for 25 extra days, whether you intended to or not. For a service business doing $500,000 in annual revenue, a 25-day DSO gap represents roughly $34,000 in working capital tied up in receivables at any given time. That is money that could be in your bank account instead.
Several factors push DSO up in practice. Large enterprise customers often have 45–60 day standard payment terms baked into their accounts payable processes regardless of what your invoice says. Government entities process invoices on procurement cycles that ignore your due date. Construction clients often wait for draw approvals from their own lenders before paying subcontractors. Some of these you can negotiate; some you cannot. The ones you can fix are: your own invoice timing (invoice immediately, not monthly), your payment terms (shorter terms are negotiable), and your follow-up cadence (calling at day 3 versus day 30 moves the needle regardless of sector).
If your DSO is materially above your industry benchmark, the first thing to audit is invoice timing. Many service businesses that think they have a collections problem actually have an invoicing-delay problem — work is completed in week 1 but invoiced in week 4, artificially inflating receivables age. Track issue-date DSO separately from work-delivery DSO to isolate the real driver.
Industry benchmarks shift. Some sectors that ran 60-day DSO historically have tightened as accounting software and digital payments improved. Construction is a notable exception — retainage, draw schedules, and lien-cycle mechanics keep DSO structurally high in ways that technology alone does not solve.