There's a version of accounts receivable that amounts to sending invoices and waiting. Bills go out. Customers pay when they pay. The aging report grows quietly until it's reviewed in a quarterly business conversation, at which point the numbers look concerning and nobody is quite sure when the problem started.
Then there's accounts receivable done correctly: invoices sent accurately and promptly, aging monitored weekly, collections follow-up on a defined schedule, disputes resolved before they become write-offs, and cash application processed the same day payments arrive. The difference between those two versions shows up directly in days sales outstanding – and DSO differences of 20, 30, or 40 days translate to real working capital that a company either has access to or doesn't.
Billing and invoicing are where it starts. Invoices need to go out accurately – the right amount, to the right contact, with correct payment instructions – and they need to go out promptly after the billing trigger (delivery, service completion, billing period end). Late or inaccurate invoices give customers an easy reason to delay payment, and that delay is entirely preventable.
Collections is the part that separates strong AR specialists from adequate ones. Following up on overdue accounts requires a consistent cadence – a gentle reminder at 30 days past due, a more direct communication at 45, an escalation at 60 – and the judgment to know when a soft approach isn't working and a firmer one is needed. It also requires customer relationship sensitivity. A collections call handled badly doesn't just delay payment; it damages the customer relationship. A specialist who can maintain a professional, firm tone while preserving the relationship is genuinely valuable.
Cash application is detail work that requires precision. When payments arrive – checks, ACH, wire transfers, credit card payments – each one has to be matched to the correct open invoice and applied in the system the same day or the next business day at the latest. Unapplied cash sitting on the books distorts the aging report and makes it impossible to know the true state of outstanding receivables. An AR specialist who applies cash promptly and investigates mismatches – partial payments, payments without remittance, payments for invoices that don't match – keeps the system clean.
Dispute management is the most judgment-intensive part of the role. When a customer disputes an invoice – claiming the amount is wrong, the goods weren't received, the service wasn't delivered as described – the AR specialist is usually the first person in contact. They need to investigate the claim, coordinate with whoever owns the customer relationship, and resolve the dispute in a way that gets the right amount paid as quickly as possible. Disputes that sit unresolved become write-offs.
Days sales outstanding – the average number of days it takes to collect after a sale – is the clearest measure of how well the AR function is working. Industry benchmarks vary, but for most B2B businesses, DSO below 45 days signals a healthy AR process. DSO above 60 days typically indicates either collections follow-up is inadequate or billing accuracy is creating disputes that delay payment.
A 20-day improvement in DSO for a company with $5M in annual revenue represents roughly $275,000 in working capital freed up – cash the company has access to rather than waiting on. That's the financial case for getting this hire right. AR isn't a back-office function; it's a direct driver of cash availability.
Here’s a list of non-negotiables to keep an eye out for to ensure that you find an AR specialist that gets your books in place:
MAVI places AR specialists with 3–5+ years of full-cycle AR experience, pre-vetted for collections cadence ownership and cash application accuracy. Placement in as fast as five days, at 50–70% less than a US-market equivalent, with a 14-day risk-free trial.
A billing specialist focuses on generating and sending invoices – ensuring the right amount is billed to the right customer on the right schedule. An AR specialist has broader ownership: they manage the collections process after invoices go out, apply incoming payments, handle customer disputes, and monitor the aging report. In lean finance teams, one person often covers both. In higher-volume environments, splitting the roles produces better results in each area.
By a combination of dollar amount and days past due. Large balances past 45 days warrant immediate direct outreach. Mid-size balances at 30 days get the standard follow-up sequence. Small balances can be batched and managed efficiently. An AR specialist who treats all open items equally wastes effort on small amounts while high-value balances age further. Ask candidates directly how they prioritize – the answer reveals whether they manage the function strategically or just work through a list.
Compare your DSO to your stated payment terms. If you extend net-30 terms and your DSO is 55 days, you're collecting 25 days later than contracted – which means either collections follow-up is inadequate, billing accuracy is generating disputes, or you're extending terms to customers who aren't paying on them. The best baseline comparison is your own historical DSO trend: if it's been climbing for two or three quarters without a corresponding change in customer mix or terms, the AR function needs attention.
QuickBooks and NetSuite cover most small and mid-market companies. For SaaS and subscription businesses, Stripe, Zuora, Chargebee, and similar billing platforms are often the source of invoice generation, with accounting system integration for the GL entries. An AR specialist who has worked in your specific billing and accounting stack will ramp faster than one learning the systems from scratch – worth confirming in the interview process.