Tools / Fixed vs FBT

Fixed bundle vs FBT

Decide whether shoppers need a merged kit line or separate frequently-bought-together companions. Results stay in your browser; install RRR Bundles when you are ready to publish checkout-safe offers.

Calculate

How it works

This tool focuses on fixed bundle vs fbt decisions merchants make before installing a bundling app. Inputs stay in your browser; nothing is uploaded.

When you are ready to go live, create the matching offer in RRR Bundles so pricing applies through Shopify Functions rather than fragile theme scripts. Plan limits use attributed bundle revenue, not whole-store GMV.

Open the Fixed creation demo for field-by-field setup after you trust the numbers.

Merchants searching for guidance on fixed bundle vs fbt usually need both a number and a next step. This page supplies the number; RRR supplies Functions-backed execution, theme embeds without code edits, and analytics on attributed bundle revenue.

Use conservative inputs. It is better to under-promise in a calculator and over-deliver in Analytics than the reverse.

How to read your result

Treat green results as permission to prototype, not a guarantee. Re-run with pessimistic attach rates and higher discount costs. If the story only works with heroic assumptions, change the offer design.

After install, compare estimates to Analytics attributed revenue and AOV with vs without bundles.

Share screenshots of the result panel with your team. Align on the offer type badge before anyone edits the live theme.

When to use this vs other tools

After you pick a winner, price kits with kit pricing or map companions in FBT companions.

Related tools: Kit pricing FBT companions.

Worked example

A mid-size DTC brand runs this planner during a Friday pricing review, captures the recommended configuration, then builds the offer as a draft in RRR Bundles over the weekend. They enable Functions Monday morning and watch attributed revenue for two weeks before increasing discount depth.

For strategy depth, read the companion article once published: /blog/fixed-bundle-vs-frequently-bought-together.

After the worked pass, open this calculator again with last month's real sessions or costs so the model matches your store.

Going deeper on fixed vs fbt

This section expands the fixed vs fbt workflow for Shopify merchants who need search-friendly, practical detail beyond the calculator card.

Implementation notes in RRR Bundles

Create the offer Disabled, preview on a draft theme, then Enable and wait for the live sync badge. Activate discount, cart transform, and validation Functions in Settings. Theme widgets are embeds and blocks — the app does not write into your theme files.

After launch, compare this page’s estimate to Analytics: attributed revenue, AOV with vs without bundles, and funnel views → ATC → orders. If results lag the model, adjust attach assumptions before deepening discounts.

SEO and merchandising tips

Dedicated kit pages (Fixed / Builder) can rank for gift queries; FBT and Cross-sells enrich existing PDPs. Keep offer titles clear, translate widget strings for Markets you sell into, and schedule Active dates for campaigns instead of remembering to toggle offers manually.

Prefer attributed-revenue plan caps so a strong non-bundle week does not force an upgrade. New eligible RRR charges include a 14-day free trial so you can validate Functions pricing before the first invoice.

When to get a second opinion

If two calculators disagree — for example AOV lift looks huge but BOGO margin is thin — trust the margin tool. Revenue without profit is not a growth plan. Use decision quizzes when the offer shape is unclear, then return to builders for numbers.

Trust, compliance, and next clicks

These planners never ask for your myshopify domain and never require install to compute a result. When you choose to continue, installation starts on the Shopify App Store — the supported path for App Store requirement 2.3.1.

Read the privacy policy for what RRR stores after install, and the FAQ for Functions, caps, and theme embeds. For a narrative walkthrough of the same ideas, publish the companion article linked in Related resources from the Ops blog CMS.

If you manage multiple stores, export bundle JSON after the first win and reuse the definition. Agencies can standardize on Multipack or FBT templates per vertical using the same economics you just modeled.

Bookmark this page for quarterly pricing reviews. Re-running the same inputs after a catalog change often reveals that yesterday’s “safe” discount no longer clears your floor — especially when suppliers raise unit costs mid-season.

FAQ

What does merge at checkout mean?

Fixed bundles can collapse components into one line via cart transform. FBT never merges — lines stay separate with an optional discount.

Which ranks better for SEO?

A dedicated Fixed kit product page can rank for gift-set queries. FBT lives on existing PDPs and cart blocks instead.

Can I run both?

Yes on different products. Avoid conflicting buy-box offers on the same PDP — see stacking notes in the FAQ.

Where do I create each type?

Fixed guide and FBT guide.