diff --git a/site/docs.md b/site/docs.md
index b528d836a..dd51ea36c 100644
--- a/site/docs.md
+++ b/site/docs.md
@@ -81,7 +81,8 @@ A growing collection of tutorials, how-tos and discussion of general topics.
 
 ### Journal entries
 
-[Example journal entries](entries.html)\
+[Basic journal entries](entries.html)\
+[Project accounting](project-accounting.html)\
 
 
 ### Data entry/import
diff --git a/site/project-accounting.md b/site/project-accounting.md
new file mode 100644
index 000000000..80410d54b
--- /dev/null
+++ b/site/project-accounting.md
@@ -0,0 +1,68 @@
+# Project accounting
+
+Some ways to track small business/freelancer activity - orders, budgets, invoices, payments..
+
+## Accrual method
+
+Revenue is declared when work is performed:
+
+```journal
+; budget:* - virtual accounts tracking what customers have committed
+; to pay for various things. Should not go below 0.
+2017/10/30 Order from CUSTOMER (order id) 
+    (budget:CUSTOMER:PROJECT_ID:pos1)                       1000
+    (budget:CUSTOMER:PROJECT_ID:pos2)                       3000
+     
+; some work was done on pos1 and pos2, invoice for it.
+; Using accrual accounting method
+; (revenue is declared when work is done, ~= when invoiced)
+2017/10/31 Invoice (invoice id) - (PROJECT_ID)
+    (budget:CUSTOMER:PROJECT_ID:pos1)                       -500  ; update project budget
+    (budget:CUSTOMER:PROJECT_ID:pos2)                      -1000
+    assets:receivable:CUSTOMER:PROJECT_ID:pos1               500
+    assets:receivable:CUSTOMER:PROJECT_ID:pos2              1000
+    revenues:CUSTOMER
+    (liabilities:tax:federal)                               -150  ; note tax due, eg 15% of revenue
+
+; a customer payment is received
+2017/11/15 Payment for INVOICE_ID
+    assets:receivable:CUSTOMER:PROJECT_ID:pos1              -500
+    assets:receivable:CUSTOMER:PROJECT_ID:pos2             -1000
+    assets:bank:checking
+
+; make a tax payment
+2018/4/15 Pay taxes due from 2017
+    liabilities:tax:federal                                 5000
+    assets:bank:checking
+```
+
+## Cash method
+
+Revenue is declared when payment is received:
+
+```journal
+2017/10/30 Order from CUSTOMER (order id) 
+    (budget:CUSTOMER:PROJECT_ID:pos1)                       1000
+    (budget:CUSTOMER:PROJECT_ID:pos2)                       3000
+
+; record an invoice sent. Not a real transaction in cash accounting,
+; but we can balance it with the project budget as shown:
+2017/10/31 Invoice (invoice id) - (PROJECT_ID)
+    budget:CUSTOMER:PROJECT_ID:pos1                         -500
+    assets:receivable:CUSTOMER:PROJECT_ID:pos1               500
+    budget:CUSTOMER:PROJECT_ID:pos2                        -1000
+    assets:receivable:CUSTOMER:PROJECT_ID:pos2              1000
+
+; receive payment. Cash basis, so revenue declared here.
+2017/11/15 Payment for INVOICE_ID
+    (assets:receivable:CUSTOMER:PROJECT_ID:pos1)            -500
+    (assets:receivable:CUSTOMER:PROJECT_ID:pos2)           -1000
+    revenues:CUSTOMER                                      -1500
+    (liabilities:tax:federal)                               -150  ; note tax due, eg 15% of revenue
+    assets:bank:checking
+
+; make a tax payment
+2018/4/15 Pay taxes due from 2017
+    liabilities:tax:federal                                 5000
+    assets:bank:checking
+```