A customer hands you a $1,500 deposit in March for a guitar you won't deliver until October, built from a set of Brazilian rosewood you bought seven years ago for a fraction of what it's worth today. If your books record that deposit as income the day it lands and value that rosewood at its original receipt, you're not just misreading your own profitability — you're building a tax return on numbers that don't reflect what actually happened in your shop.
Custom lutherie is one of the few small-business categories where the raw material appreciates while it sits on the shelf, the "inventory" is sorted more like a wine cellar than a stockroom, and a single build can take two months of calendar time but only three weeks of actual labor. None of that maps cleanly onto the bookkeeping habits most craft businesses borrow from retail or general contracting. Here's how to build a set of books that actually matches how a one- or two-person guitar shop makes money.
Your Tonewood Isn't Inventory in the Normal Sense
Most small businesses buy inventory, sell it, and replace it — the cost of goods sold roughly tracks purchase price, and turnover happens in weeks or months. A luthier's wood room works differently. Builders routinely buy tonewood sets — a matched back-and-sides set of rosewood, koa, or figured maple, plus a spruce or cedar top — years before they're used, specifically because well-seasoned, properly dried wood produces a better-sounding, more stable instrument. Some builders buy sets a decade in advance for their most expensive commissions.
That creates two bookkeeping problems most inventory software isn't built for:
Cost basis versus replacement value. The rosewood set you bought in 2018 for $400 might cost $1,200 to replace today, especially with the scarcity created by CITES restrictions (more on that below). Standard accounting keeps that set on your books at its original $400 cost — which is correct for tax purposes — but if you're pricing new builds off "what this wood is worth," you need a separate mental (or actual) ledger of current replacement cost so you don't underprice a guitar built from wood that would cost three times as much to buy today.
Aging as a value-adding process, not a cost. Wine ages in a cellar and the aging itself is treated as part of production cost in some accounting frameworks (a concept sometimes formalized as "aging inventory" with capitalized carrying costs). Tonewood aging is similar in spirit — the wood is more valuable stable and dry than it was green — but almost no luthier actually capitalizes storage costs into the wood's basis, and you don't need to for tax purposes. What you do need is an inventory record that tracks each set individually: species, dimensions, acquisition date, acquisition cost, and which build (if any) it's earmarked for. A spreadsheet or a plain-text ledger with one entry per set works better than a generic "raw materials" line, because you'll refer back to acquisition dates constantly — both for pricing decisions and for CITES documentation.
CITES Paperwork Is a Bookkeeping Problem, Not Just a Legal One
If you work in rosewood, ebony, or other regulated tonewoods, the Convention on International Trade in Endangered Species (CITES) is a real compliance layer on top of your normal recordkeeping. The entire Dalbergia genus (all rosewoods) was placed under CITES Appendix II protection in January 2017, and while a 2019 revision exempted finished musical instruments and instrument parts from needing a CITES certificate at resale, luthiers who import sawn boards, billets, or veneer to build with still need full import/export documentation, and Brazilian rosewood (Dalbergia nigra) carries the stricter Appendix I rules that have applied since 1992.
What this means for your books: keep the customs paperwork, import permits, and receipts for every regulated wood purchase filed with — not just adjacent to — that inventory record. If you ever sell a finished instrument internationally, or a customer asks for documentation proving a rosewood fretboard is compliant, you want to be able to pull the acquisition paperwork for that specific board in under a minute, not reconstruct it from a shoebox of receipts. Treat the CITES certificate as part of the cost record for that piece of wood, the same way you'd keep a title document with a vehicle purchase.
The Deposit Is a Liability, Not Income
This is the single most common bookkeeping mistake in commission-based craft businesses, and it's an expensive one. When a customer puts down a $1,000–$2,000 deposit to reserve a build slot, that money is not yet yours in an accounting sense — it's deferred revenue, a liability on your books representing an obligation to either deliver a guitar or refund the money. Recording it as income the day it arrives:
- Overstates your revenue and profit in the deposit month, which can push you into a higher estimated-tax bracket you don't actually owe yet
- Understates revenue in the delivery month, when the real cost of materials and labor actually lands
- Makes your monthly numbers useless for figuring out whether a given build was actually profitable, since the cash and the cost show up in different periods
The fix is straightforward even on cash-basis tax filing (which most luthier shops use, and which is fine for tax purposes): book the deposit to a liability account — something like "Customer Deposits" or "Unearned Build Revenue" — and only move it to income when the instrument is delivered and the balance is paid. Plain-text, ledger-based accounting systems handle this cleanly because a deposit is just a transfer between a customer's balance and your deposit liability account, with a second transaction recognizing revenue at delivery. Whatever software you use, the two-step structure — receive as liability, recognize as revenue on delivery — is the part that matters, not the specific tool.
Costing a 40–80 Hour Build Against a Deposit Taken Months Earlier
A typical solo-builder acoustic or electric guitar runs somewhere between 40 and 80 hours of shop time, spread over a build calendar of two to six months once you account for drying time between finish coats, glue cure times, and simply working multiple commissions in parallel. That mismatch — short labor time, long calendar time — makes work-in-progress (WIP) tracking essential if you want to know whether you're actually making money.
A minimal WIP system for a one-person shop needs three things per build:
- A job number or job tag attached to every material purchase and every logged labor hour for that specific instrument, from the day the deposit lands to the day it ships
- A running materials total — tonewood set, hardware (tuners, bridge, pickups), finish supplies, case — charged against that job as you draw from stock
- A labor estimate versus actual comparison, even if you're not paying yourself an hourly wage — tracking actual hours against your 40–80 hour estimate is the only way to know if a particular body shape, inlay pattern, or finish choice is quietly eating your margin
Independent pricing research on the custom guitar market puts most respected independent builders in the $3,500–$6,000 range for a standard commission, with newer builders starting around $1,200–$1,500 and established names running $9,000 and up for guitars built from premium, scarce tonewood sets. If your materials plus a realistic hourly rate for 60 hours of labor don't clear your price point with room for overhead (rent, insurance, tool depreciation), that's a pricing problem your books will surface — but only if you're tracking cost per job instead of looking at your bank balance at the end of the month.
Handling the Waitlist and Partial Payments
Many shops with a backlog take a build deposit, a second progress payment partway through construction, and a final balance on delivery. Each of those is a separate transaction against the same job's liability account, and none of them are income until the corresponding milestone — usually final delivery and acceptance — is reached. If you offer a refund policy for a canceled commission (common practice, sometimes with a restocking or labor-to-date charge if wood has already been cut), make sure your records can isolate exactly what's refundable versus what's already been consumed as materials or labor, since that's the number a customer dispute will hinge on.
Keep Your Build Books as Clear as Your Instruments
The details that make a guitar sound right — a properly seasoned top, a neck joint cut to spec — are the same kind of precision your books deserve. Beancount.io offers plain-text, version-controlled accounting that makes it straightforward to tag every purchase and labor hour to a specific job, track deposits as liabilities until they're earned, and keep a permanent, auditable record of what each tonewood set actually cost. Get started for free and see why makers who care about precision in the shop are bringing that same discipline to their books.