AP & Spend Automation3 min readUpdated September 2026

BILL vs Tipalti for Building Material Distributors

For commercial building material suppliers, the right choice between BILL and Tipalti is whichever keeps rebate and early-pay discount money from slipping away. Payables run on hundreds of small purchase orders, rebate programs tied to annual purchase thresholds, and discounts that only pay off if someone is actually watching the calendar.

Here's a checklist of the pitfalls that show up most often, and where each platform helps avoid them.

Vendors Covered in this Article

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How do you avoid missing early-pay discount windows?

For example, distributors commonly offer 1 to 2 percent discounts for paying within 10 days instead of the standard 30, and that discount disappears the moment finance is working through a stack of invoices reactively instead of proactively. BILL surfaces discount terms on an invoice and can flag the window in your approval queue; Tipalti does the same but within a broader configuration setup. Either way, the fix is the same: someone needs to review new invoices against their discount terms within a day or two of receipt, not whenever the pile gets worked down.

How do you track manufacturer rebate thresholds?

Annual purchase rebates from manufacturers depend on hitting a cumulative volume threshold, and that tracking almost never lives inside an AP platform; it lives in a spreadsheet, a rebate management tool, or your distribution ERP. Say you're 8 percent short of a rebate tier with six weeks left in the year, neither BILL nor Tipalti will flag that for you. What they can do is give you clean, exportable payment history by vendor, which is the raw data a rebate tracking process needs and often doesn't have in an easy-to-pull format.

Pitfall: treating every vendor the same when terms vary widely

A building materials supplier's vendor list usually spans large manufacturers with standard net-30 terms, regional mills with tighter cash needs and shorter terms, and the occasional international supplier for specialty materials, insulation components or specific hardware, with entirely different payment expectations. Payables days in building materials distribution tend to run long because of established trade credit relationships with contractors and manufacturers alike1, but that average hides real variation by vendor, and a platform that treats every vendor's terms as interchangeable will get some of them wrong.

Pitfall: high invoice volume overwhelming a manual approval chain

A distributor processing hundreds of purchase invoices a month can't route every one through a single approver without creating a bottleneck that slows payment across the board, which then jeopardizes the very discount windows and vendor relationships the business depends on. Both BILL and Tipalti support tiered approval limits, so routine, lower-dollar restocking orders can clear with one sign-off while larger or unusual purchases still get a second look.

Set those tiers based on actual invoice data rather than a guess: pull six months of purchase invoices, look at where the bulk of the dollar volume actually sits, and set the low-touch tier high enough to cover routine restocking without requiring a second signature on every single order, or the tiering won't reduce the bottleneck it was meant to fix.

Pitfall: picking a platform before mapping vendor-managed inventory arrangements

Some building material suppliers run vendor-managed inventory programs with their own upstream manufacturers, where invoicing is tied to consumption rather than a traditional PO. That billing pattern doesn't map cleanly onto either platform's default invoice workflow, so if VMI arrangements are a meaningful share of your purchasing, confirm with either vendor how consumption-based billing gets entered before assuming your current process will translate directly.

Pitfall: assuming branch locations all need the same approval chain

A distributor running multiple branch locations often has different purchasing managers at each one, and a single company-wide approval chain either bottlenecks every branch on one person or gives every branch manager the same authority regardless of how much they typically spend. Set approval limits per branch or per role rather than applying one blanket rule, and revisit those limits at least once a year as branch volume shifts, since a limit set for a smaller branch two years ago can quietly become a bottleneck once that location grows.

Pitfall: not testing the platform against your busiest month first

Building material demand is seasonal in most regions, with spring and summer volume well above winter. Piloting a new AP platform during a slow month tells you almost nothing about whether it holds up when invoice volume triples. If you can, run the pilot leading into your busiest stretch rather than during your quietest one, so you find out whether approval routing and payment batching actually scale before you're depending on it during the season when a slowdown costs the most.

A short checklist before you commit to a platform:

  • Review new invoices promptly so discount windows are acted on instead of lost in an approval queue.
  • Track rebate thresholds in a spreadsheet, rebate tool or ERP, and export payment history by vendor to feed it.
  • Set payment terms vendor by vendor, since large manufacturers, regional mills and international suppliers differ widely.
  • Set approval limits by branch, and pilot the platform heading into your busiest stretch rather than a slow month.
Executive Capability Standard

What Good Looks Like

Good AP for a building materials distributor means early-pay discounts get captured before they expire and payment history is clean enough to feed rebate tracking without extra manual pulling.

Building The Capability (5-Stage Skill Ladder)

1. Learn:Learn each major vendor's discount terms and rebate thresholds well enough to spot when an invoice qualifies without checking a contract.
2. Do Manually:Review new invoices against discount windows within a day or two of receipt and track rebate progress in a shared spreadsheet.
3. Delegate:Hand routine invoice entry and discount-window flagging to an AP clerk, keeping rebate tracking with a controller.
4. Automate:Route routine restocking invoices through BILL with tiered approval limits so low-dollar purchases don't bottleneck on one approver.
5. Buy:Move to Tipalti if international specialty-material suppliers or multi-entity distribution locations make its broader setup worth the time.

How to Get Started

Disclosure: We may earn a commission if you buy through some links on this page. It doesn't change what we recommend.

Frequently Asked Questions

Will BILL or Tipalti automatically capture early-pay discounts for us?

Neither pays automatically without approval, but both surface the discount terms on an invoice so an approver can act within the window. The actual capture still depends on someone reviewing new invoices promptly rather than letting them sit in a queue, which is a process discipline question as much as a software one.

Can either platform track progress toward a manufacturer rebate tier?

No, rebate threshold tracking isn't a feature of either platform. You'll still need a spreadsheet, rebate management tool or your distribution ERP for that; the AP platform's role is providing clean, exportable payment history by vendor to feed that tracking.

How should we handle vendor-managed inventory billing in an AP platform?

Check with the platform on how consumption-based invoices, rather than traditional PO-triggered ones, get entered before assuming your current VMI process will carry over directly. Most suppliers end up entering these as recurring bills tied to a reporting period rather than a one-off purchase order.

Sources

Where we quote a benchmark, we show its source. Other figures in this guide are estimates or general guidance, so check them against your own numbers.

  1. Payables days (AP/Sales x 365) by industry (US). NYU Stern (Aswath Damodaran), Working Capital Ratios by Industry, US, 2026.

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